The balanced chemical equation for the reaction between nitrogen and hydrogen to form ammonia is:
N2(g) + 3H2(g) ⟶ 2NH3(g)
Using the given initial moles of nitrogen and hydrogen, we can calculate the limiting reactant and the amount of ammonia produced.
Number of moles of N2 = 0.100 mol
Number of moles of H2 = 0.321 mol
To determine the limiting reactant, we need to compare the moles of each reactant to their stoichiometric ratio in the balanced equation. The stoichiometric ratio of N2 to H2 is 1:3, which means that 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3.
Moles of H2 required = 3 x moles of N2 = 3 x 0.100 = 0.300 mol
Since we have more moles of H2 than required (0.321 mol), H2 is in excess and N2 is the limiting reactant.
The amount of NH3 produced is determined by the moles of the limiting reactant. Since 1 mole of N2 reacts with 2 moles of NH3, the number of moles of NH3 produced is:
Moles of NH3 = 2 x moles of N2 = 2 x 0.100 = 0.200 mol
Therefore, 0.200 mol of NH3 are produced.
To calculate the moles of H2 and N2 remaining, we need to determine how much of each was not consumed in the reaction. Since N2 is the limiting reactant, all of the H2 would not be consumed, but only a portion of the N2 would react.
Moles of H2 remaining = Initial moles of H2 - Moles of H2 consumed
Moles of H2 remaining = 0.321 mol - (3 x moles of N2 consumed)
Moles of H2 remaining = 0.321 mol - (3 x 0.100 mol)
Moles of H2 remaining = 0.021 mol
Therefore, 0.021 mol of H2 remains.
Moles of N2 remaining = Initial moles of N2 - Moles of N2 consumed
Moles of N2 remaining = 0.100 mol - moles of N2 consumed
Moles of N2 remaining = 0.100 mol - 0.100 mol
Moles of N2 remaining = 0 mol
Therefore, all of the N2 is consumed and 0 moles of N2 remains.
In summary:
Moles of NH3 produced = 0.200 molMoles of H2 remaining = 0.021 molMoles of N2 remaining = 0 molThe limiting reactant is N2.[tex]\huge{\colorbox{black}{\textcolor{lime}{\textsf{\textbf{I\:hope\:this\:helps\:!}}}}}[/tex]
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mistrys
stions
Assume that the reaction below is at equilibrium. A stress is
then applied as described. Click on the appropriate circle to
indicate how the system will respond to the stress.
2NO₂(g) NO3(g) + NO(g)
The volume is increased.
O Shifts to Left O Shifts to Right O No Change
There would be no change in the equilibrium position since the number of volumes on both sides of the reaction equation are equal.
What is the Le Chateliers principle?The equilibrium chemical system will alter as expected by the Le Chatelier principle of chemistry if one or more of the system's influencing elements change.
According to this idea, if a stress is introduced to a system while it is in equilibrium, the system will adjust in a way that partially offsets the stress and returns it to equilibrium.
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calculate the concentration of Ag+ required to begin precipitation of Ag2CO3 in a solution that is 2.50x10-6 M in CO32-. (Ksp =8.1 x 10-12)
The minimal concentration of Ag⁺ necessary to initiate precipitation of Ag₂CO₃ in a solution with a concentration of 2.50x10-6 M in CO₃²⁻ is 0.00569 M.
How to calculate concentration?The balanced equation for the precipitation of Ag₂CO₃ is:
Ag₂CO₃(s) ⇌ 2Ag+(aq) + CO₃²⁻(aq)
The solubility product expression for Ag₂CO₃ is:
Ksp = [Ag+]²[CO₃²⁻]
We are given that the concentration of CO₃²⁻ in the solution is 2.50 x 10⁻⁶ M, and the Ksp of Ag₂CO₃ is 8.1 x 10⁻¹². We can use these values to calculate the minimum concentration of Ag+ required to start the precipitation of Ag₂CO₃.
Ksp = [Ag⁺]²[CO3²⁻]
8.1x10⁻¹² = [Ag+]²(2.50x10⁻⁶)
[Ag⁺]² = 3.24 x 10⁻⁵
[Ag⁺] = √(3.24 x 10⁻⁵)
[Ag⁺] = 0.00569 M
Therefore, the minimum concentration of Ag⁺ required to begin precipitation of Ag₂CO₃ in a solution that is 2.50x10-6 M in CO₃²⁻ is 0.00569 M.
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Given the law of conservation of energy what happens when a 200°C iron bar is placed in thermal contact with a 30°C block of wood? • A. Energy leaves the iron bar and enters the wood until the temperatures are equal. • B. Energy leaves the wood and enters the iron bar until the temperatures are equal. • C. All the energy from the iron bar is transferred to the wood. O D. All the energy from the wood is transferred to the iron bar
Given the law of conservation of energy, (A) Energy leaves the iron bar and enters the wood until the temperatures are equal.
What is the second law of conservation of energy?Per the initial law of thermodynamics called the Law of Conservation of Energy, it is established that energy cannot indeed be produced nor destroyed but rather changed from one form into the next or transferred.
As such, it logically follows that across a closed arena originating at any point and continuing towards infinity necessarily maintains an evenhandedness regarding cumulative power throughout time without fluctuation whatsoever.
This fundamental principle elucidates physics as a whole- from minuscule cells to vast expanses within space.
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If you start with 4.500 moles of ethylene (C₂H4), how many grams of carbon dioxide will be produce
C₂H4+3 O₂ → 2 CO₂ + 2 H₂O
Answer:
396.09 grams of CO₂ are produced in this reaction.
Explanation:
To determine how many groms of CO₂ are produced, you need to use dimensional analysis.
4.500 moles of ethylene · (2 moles CO₂ / 1 mole ethylene) · (44.01 grams CO₂ / 1 mole CO₂) = 396.09 grams of CO₂
14. Three (3) batteries are connected in series so that
the total voltage is 54 volts. The voltage of the
first battery is twice the voltage of the second
and 1 the voltage of the third battery. Find the
actual voltage of each battery.
The actual voltage of each battery is:
First battery: 43.2 VSecond battery: 21.6 VThird battery: 10.8 VTo find the actual voltage of each batteryLet's denote the voltage of the second battery as "V". Then, according to the problem statement, the voltage of the first battery is 2V, and the voltage of the third battery is V/2.
When three batteries are connected in series, the total voltage is the sum of the individual voltages. Therefore
Total voltage = voltage of first battery + voltage of second battery + voltage of third battery
54 V = 2V + V + (V/2)
Multiplying the third term on the right side by 2 to get a common denominator:
54 V = 2V + V + (1/2)V
54 V = (5/2)V
V = (2/5) x 54 V
V = 21.6 V
So, the voltage of the second battery is V = 21.6 V.
Using this value, we can find the voltage of the first and third batteries:
Voltage of first battery = 2V = 2 x 21.6 V = 43.2 V
Voltage of third battery = V/2 = 21.6 V / 2 = 10.8 V
Therefore, the actual voltage of each battery is:
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True or false? Ocean currents that move up and down are called surface currents.
to a 13.6 ml 0.0246 m naci solution, you add 0.00482 g agno3. will agcl precipitate out from this solution? (k sp = 1.6 x 10-10)
Yes, the AgCl will precipitate out from this solution.
What is the Ksp?First of all we know that[Ag^+] = [Cl^-] = [AgCl]
As such we have that
[AgCl] = √Ksp
= √1.6 x 10^-10
= 1.26 8 10^-5 M
Number of moles of the AgCl = 1.26 8 10^-5 M * 13.6/1000
= 1.6 * 10^-7 moles
Then;
Number of moles of NaCl = 13.6/1000 * 0.0246
= 3.3 * 10^-4 moles
Number of moles of AgNO3 = 0.00482 g /170 g/mol
= 2.8 * 10^-5 moles
The reaction equation is;
AgNO3 + NaCl --->AgCl + NaNO3
The reaction is 1:1 thus AgNO3 is the limiting reactant and the amount of the AgCl formed is 2.8 * 10^-5 moles.
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In your own words, describe Hund's first and second rules that describe electron arrangement.
Create the orbital notation for the element sulfur. Describe the orbital notation in detail. For example, 1s: up arrow down arrow; 2s up arrow down arrow; 2p three up arrows.
Explanation:
Hund's first and second rules describe how electrons are arranged in an atom's orbitals. Hund's first rule states that when electrons occupy orbitals of equal energy (such as the three p orbitals in a given shell), they will each first occupy separate orbitals before any orbital receives a second electron. This means that electrons will always try to maximize their spin, with one electron in each orbital having the same spin before any pairing occurs.
Hund's second rule states that if two or more orbitals of the same energy level are available, electrons will occupy empty orbitals before they pair up in an orbital that already has an electron.
Now, let's look at the orbital notation for sulfur. The atomic number of sulfur is 16, which means it has 16 electrons.
The orbital notation for sulfur would be:
1s² 2s² 2p⁶ 3s² 3p⁴
This indicates that sulfur has two electrons in the 1s orbital, two electrons in the 2s orbital, and six electrons in the 2p orbital, fully occupying all three 2p orbitals with two electrons in each and spinning in the same direction. Sulfur also has two electrons in the 3s orbital and four electrons in the 3p orbital, with a single electron in each of the three 3p orbitals and the fourth 3p orbital being half-filled. The half-filled 3p orbital is a consequence of Hund's rule, which predicts that electrons will fill each of the three 3p orbitals with one electron before any two orbitals receive a second electron.
Calculate the root mean square velocity, in m/s, of CH₄ at -23.0 °C. Assume ideal gas behavior. Report your answer to one decimal place.
The root mean square velocity of CH₄ at -23.0 °C is 520.1 m/s, rounded to one decimal place.
What is square velocity?
Root mean square velocity is a measure of the average speed of particles in a gas. It is defined as the square root of the average of the squares of the individual particle velocities. In other words, it is the square root of the sum of the squares of the velocities of all the gas particles divided by the total number of particles.
The root mean square velocity (urms) of a gas is given by the following equation:
urms = √((3RT) / M)
where R is the gas constant, T is the temperature in kelvin, and M is the molar mass of the gas.
First, we need to convert the temperature from Celsius to Kelvin:
T = -23.0 + 273.15 = 250.15 K
The molar mass of CH₄ is 16.04 g/mol.
M = 16.04 g/mol
We also need the gas constant R in SI units. The value of R is 8.314 J/(mol K).
Substituting the values into the equation, we get:
urms = √((3 x 8.314 J/(mol K) x 250.15 K) / (16.04 g/mol))
= 520.1 m/s
Therefore, the root mean square velocity of CH₄ at -23.0 °C is 520.1 m/s, rounded to one decimal place.
The root mean square velocity is proportional to the square root of the temperature and inversely proportional to the square root of the molar mass of the gas. This means that at a given temperature, lighter gases will have higher root mean square velocities than heavier gases.
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What is the half-life (in seconds) of a zero-order reaction which has an initial reactant concentration of 0.934 M with a k value of 5.43 × 10–2 M/s?
8.61 seconds constitute the zero-order reaction's half-life.
What is zero-order reaction ?A form of chemical reaction known as a zero-order reaction is one in which the rate of reaction is unaffected by the concentration of one.
The rate equation for a zero-order reaction is rate = k[A]0 = k
Where [A] is the concentration of the reactant.
A zero-order reaction's half-life (t1/2) is calculated using the formula: t1/2 = [A]0 / 2k
where [A]0 is the reactant's initial concentration.
When we enter the problem's data, we obtain: t1/2 = 0.934 M / (2 x 5.43 x 10-2 M/s) = 8.61 seconds.
Therefore, 8.61 seconds constitute the zero-order reaction's half-life.
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The table shows the percentage composition of elements in a 100 g sample of the compound.
Percentage Composition Element
Percentage
Al - 34.6%
O - 61.5%
H -3.8%
Determine the mass of oxygen in a 4.5 g sample of the compound. Show your work and include the units in your answer.
Answer & Explanation:
To determine the mass of oxygen in a 4.5 g sample of the compound, we can follow these steps:
Find the mass percentage of oxygen in the compound.
Calculate the mass of oxygen in the 4.5 g sample using the mass percentage.
According to the provided information, the mass percentage of oxygen is 61.5%.
Now, let's calculate the mass of oxygen in the 4.5 g sample:
Math
"Mass of oxygen in 4.5 g sample = (Mass percentage of oxygen / 100) × Total mass of the sample"
Plugging in the values:
Math
"Mass of oxygen in 4.5 g sample = (61.5 / 100) × 4.5 g"
Now, calculate the result:
Math
"Mass of oxygen in 4.5 g sample = 0.615 × 4.5 g = 2.7675 g"
Thus, the mass of oxygen in a 4.5 g sample of the compound is approximately 2.7675 g.
A 28.5 g piece of gold is heated and then allowed to cool. What is the change in temperature ( °C) if the gold releases 0.308 kJ of heat as it cools? The molar heat capacity of gold is 25.4 J/mol･ °C.
The heat capacity of a substance or system is defined as the quantity of heat required to raise its temperature through 1°C. It is denoted by C. Heat capacity is an extensive property. The change in temperature is 84.42 °C.
The temperature required to raise the temperature of one mole of the substance through 1°C is called the molar heat capacity. The heat required to raise the temperature of a sample of mass 'm' is:
q = mcΔT
0.308 kJ = 308 J
c = 25.4 J/mol･ °C × 1 mol Au / 197 Au = 0.128 J/g°
ΔT = q/mc = 308 / 28.5 × 0.128 = 84.42 °C
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Scientist A says 170,300 g of water per person are needed for a 6-month mission. Scientist B claims only 127,500 grams of water are needed.
How many grams of water (H2 O) will be needed to meet the oxygen demands? Use Stoichiometry to determine the answer.
Whose claim is accurate and why?
Scientist A's claim is more accurate, as it takes into account the additional water needed to produce the extra amount of oxygen required for the 6-month mission.
Determining the grams of waterTo determine the grams of water needed to meet the oxygen demands, we need to use the stoichiometry of the chemical equation for the production of oxygen in water electrolysis:
2H2O → 2H2 + O2
For every 2 moles of water consumed, 1 mole of O2 is produced. The molar mass of water is 18.015 g/mol, and the molar mass of O2 is 31.998 g/mol.
Therefore, the amount of water needed to produce 1 gram of O2 is:
(2 moles H2O / 1 mole O2) x (18.015 g H2O / 1 mole H2O) = 36.03 g H2O/g O2
To find out how many grams of water are needed for a 6-month mission, we need to know how many people are involved in the mission. Let's assume it is one person.
Scientist A claims that 170,300 g of water are needed for a 6-month mission, or approximately 28,383 g of water per month, or 946 g of water per day.
Using our stoichiometry calculation, we can determine that this amount of water would produce:
946 g H2O/day ÷ 36.03 g H2O/g O2 = 26.24 g O2/day
Over a 6-month period, this would result in a total oxygen production of:
26.24 g O2/day x 30 days/month x 6 months = 4,732.8 g O2
On the other hand, Scientist B claims that only 127,500 g of water are needed for a 6-month mission, or approximately 21,250 g of water per month, or 708.3 g of water per day.
Using our stoichiometry calculation, we can determine that this amount of water would produce:
708.3 g H2O/day ÷ 36.03 g H2O/g O2 = 19.65 g O2/day
Over a 6-month period, this would result in a total oxygen production of:
19.65 g O2/day x 30 days/month x 6 months = 3,537 g O2
Therefore, Scientist A's claim is more accurate, as it takes into account the additional water needed to produce the extra amount of oxygen required for the 6-month mission.
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Using the chemical reaction for the formation of NH3 (N2 (g) + 3H2 (g) ⇄ 2NH3 (g) + heat), how could you use Le Chatelier’s Principle to increase the production of NH3 (List all that apply)?
Le Chatelier's guideline can be utilized to support development of an ideal item in compound responses. If you lower the temperature, this will benefit to increase the production of NH₃.
Ammonia gas is created when nitrogen gas and hydrogen gas combine in the reaction N₂ +3H₂ ⇄ 2NH₃ in the Haber process for industrial synthesis; The process is exothermic, or it produces heat.
Le Chatelier’s Principle :In the chemical reaction , N₂ +3H₂ ⇄ 2NH₃ + Heat (the creation of ammonia ) is exothermic.
If you lower the temperature, this will benefit, according to Le Chatelier's Principle., A reaction will proceed very slowly at a very low temperature, rendering it ineffective. As a result, the equilibrium mixture contains a high proportion of ammonia at temperatures between 400 and 450°C.
The pressure :N₂ +3H₂ ⇄ 2NH₃ + Heat
The left side of the equation has four molecules, while the right side only has two. As indicated by Le Chatelier's Rule, the framework will answer by inclining toward the response which produces less atoms. The pressure will again drop as a result of that. As a result, consumers will react more favorably.
- The temperature, so that the equilibrium mixture can produce the most ammonia possible.
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The
Answer: The
Explanation:
what is the standard deviation of ksp and the relative standard deviation kf ksp (%RSD)
Answer:
For Trials 2 and 3, the Ksp of Ca(OH)2 was 5.2 Times 10^-6 and 4.8 Times 10^-6 respectively. What is the average Ksp of Ca(OH)2? What are the standard deviation and the relative standard deviation (%RSD) for the Ksp of Ca(OH)2? M olar Solubility, Common-Ion Effect
Explanation:
hope this helps
Why are reactions in which the reactants and products are different colors useful for identifying which direction the reaction shifts?
Reactions in which the reactants and products are different colors are useful for identifying which direction the reaction shifts because they allow us to visually observe any changes in the concentrations of the reactants and products as the reaction proceeds.
What happened if the reaction shift towards the product side and reactant side?
If the reaction shifts towards the product side, then the concentration of the products will increase while the concentration of the reactants will decrease.
This will cause a change in the color of the solution, indicating that the reaction has proceeded in the forward direction.And if the reaction shifts towards the reactant side, then the concentration of the reactants will increase while the concentration of the products will decrease. This will cause a change in the color of the solution, indicating that the reaction has proceeded in the reverse direction.
Thus, by observing any changes in color during the course of a reaction, we can infer which direction the reaction is proceeding in and adjust the reaction conditions accordingly to favor the desired direction.
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How many liters of .3M HCl are needed to neutralize 2.5L of 3M NaOH?
Answer: 2.5 lit
Explanation:
How many grams of COz are in a 5.3 L container if the pressure in the container is 101 kPa and the temperature is 280 K?
show how you get the answer please
0.189 grams of CO₂ are in a 5.3 L container if the pressure in the container is 101 kPa and the temperature is 280 K.
The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as
PV = nRT
where,
P = Pressure
V = Volume
T = Temperature
n = number of moles
Given,
Volume = 5.3L
Pressure = 101 kPa
Temperature = 280 K
Using ideal gas equation, PV = nRT
101000 × 5.3 = n × 8.314 × 280
n = 0.0043 moles
Mass = moles × molar mass
= 0.0043 × 44
= 0.189g
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Are the following Endothermic or Exothermic?
1. Water begins to boil
2. Fireworks explode
3. Sweat evaporates cooling your skin
4. Water begins to freeze into ice
5. You ignite your homework
assignments once the year is over.
6.Sunrays burn your skin
7.Cellular respiration
1. Water begins to boil - Endothermic
2. Fireworks explode - Exothermic
3. Sweat evaporates cooling your skin - Endothermic
4. Water begins to freeze into ice - Exothermic
5. You ignite your homework assignments once the year is over - Exothermic
6.Sunrays burn your skin - Exothermic
7.Cellular respiration - Exothermic
What is Exothermic and Endothermic?Exothermic and endothermic refer to two types of chemical reactions or physical processes that release or absorb energy, respectively.
Exothermic reactions release energy in the form of heat, light, or sound. When these reactions occur, they produce a net release of energy into the surroundings, which can often be felt as an increase in temperature. Examples of exothermic reactions include combustion, oxidation, and many types of explosions.
Endothermic reactions, on the other hand, absorb energy from the surroundings in order to proceed. These reactions typically feel cold to the touch and require energy to be added to the system in order to occur. Examples of endothermic reactions include melting, evaporation, and many types of chemical reactions that require heat to be added in order to proceed.
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What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution? The ksp of PbBr2 is 6.60×10−6.
Lead bromide is 0.013 Molar solubilized in a 0.500 M Lead(II) nitrate solution.
What does Ksp molar solubility mean?the Ksp is calculated using the molar solubility. The quantity of moles that dissolve in one litre of solution is known as a substance's molar solubility. This value can be fairly high, often exceeding 10.0 moles per litre of solution, for particularly soluble compounds (such sodium nitrate, Sodium nitrate). The equilibrium between an ionic solid and its ions in solution is shown by this statement.
[Lead(2+)] = 0.500 M
[Bromine-] = 2x
Substituting these values in the solubility product expression:
Ksp = [Lead(2+)][Bromine-]²
6.60×10⁻⁶ = (0.500)(2x)²
Solving for 'x', we get:
x = 0.013 M
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When a 10.0-g sample of magnesium chloride dehydrate, MgCl 2 *2H 2 O(Mm=131.24 g/mol) is completely dissolved in 100.0 g of water in a Styrofoam calorimeter, the temperature of the solution increases from 22.0°C to 36.6 deg * C The specific heat of solution is 4.18 J/g.^ C and heat capacity of calorimeter is 20. J deg * C Calculate: (a) total heat absorbed by solution and calorimeter ( b) the molar enthalpy of dissolution of MgCl_{2} * 2H_{2}*O
(a) The molar enthalpy of dissolution of MgCl2 x 2H2O is -80,604.11 J/mol. To calculate the total heat absorbed by the solution and calorimeter, we can use the following equation:
q = mCΔT
where q is the heat absorbed, m is the mass of the solution and calorimeter, C is the specific heat capacity of the solution and calorimeter, and ΔT is the change in temperature.
We know that the mass of the solution and calorimeter is 100.0 g + 10.0 g = 110.0 g, the specific heat capacity of the solution and calorimeter is 4.18 J/g.°C, and the change in temperature is (36.6°C - 22.0°C) = 14.6°C.
Plugging these values into the equation, we get:
q = (110.0 g) x (4.18 J/g.°C) x (14.6°C) = 6,149.08 J
Therefore, the total heat absorbed by the solution and calorimeter is 6,149.08 J.
(b) The molar enthalpy of dissolution of MgCl2 x 2H2O can be calculated using the following equation:
ΔH = q/n
where ΔH is the molar enthalpy of dissolution, q is the heat absorbed by the solution and calorimeter, and n is the number of moles of MgCl2 x 2H2O dissolved.
First, we need to calculate the number of moles of MgCl2 x 2H2O in the sample. We can do this using the following equation:
n = m/M
where n is the number of moles, m is the mass of the sample, and M is the molar mass of MgCl2 x 2H2O.
Plugging in the values, we get:
n = 10.0 g / 131.24 g/mol = 0.076199 mol
Now we can calculate the molar enthalpy of dissolution:
ΔH = 6,149.08 J / 0.076199 mol = -80,604.11 J/mol
Since the value is negative, it indicates that the dissolution of MgCl2 x 2H2O is exothermic. Therefore, the molar enthalpy of dissolution of MgCl2 x 2H2O is -80,604.11 J/mol.
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A 25.0 mL sample of a 0.2800 M solution of aqueous trimethylamine is titrated with a 0.3500 M solution of HCl. Calculate the pH of the solution after 10.0, 20.0, and 30.0 mL of acid have been added; pKb of (CH3)3N = 4.19 at 25°C.
Part 1 (1 point)
pH after 10.0 mL of acid have been added =
Part 2 (1 point)
pH after 20.0 mL of acid have been added =
Part 3 (1 point)
pH after 30.0 mL of acid have been added =
A 25.0 mL sample of a 0.2800 M solution of aqueous trimethylamine is titrated with a 0.3500 M solution of HCl. 9.81 is the pH after 10.0 mL of acid have been added.
pH, often known as acidity in chemistry, has historically stood for "the possibility of hydrogen" (or "influence of hydrogen"). It refers to a scale used to describe how basic or how acidic an aqueous solution is. When compared to basic or alkaline solutions, acidic solutions—those with higher hydrogen (H+) ion concentrations—are assessed to have lower pH values.
V × 0.2125 M HCl = 25 mL ×0.17 M
V = 20 ml
pOH = pKb + log(salt/base)
or pOH = 4.19 + log (0.2125 ×10 / 25 ×0.17 - 10 ×0.2125 )
pOH = 4.19 and pH = 14 - 4.19 = 9.81
2)pH = 7 - 0.5 pKb - 0.5 log C
pH = 7 - (0.5*4.19) - (0.5 log (25*0.17) / (25+20))
= 5.42
3)pH = - log (0.2125*10 / 25 + 30 )
= 1.326
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Which organism below is a producer?
a Lynx (animal)
b White spruce (Tree)
c Red squirrel (animal)
d Spruce grouse (animal)
Answer:
b) spruce tree
Explanation:
Producers have the capability to produce their own food and energy and are often at the bottom of the food chain. Of the given answers, a white spruce is the only organism that is capapble of producing its own food, therefore it is a producer.
Stade principle behind the manufacture of Sulphuric acid by Contact process. I what are physical conditions to get maximum yield. Draw the flow Sheet diagram for the manufac- ture of sulphuric acid. у
Fill in all non-shaded boxes.
Considering the given equation of reaction in equilibriums:
2CH3OH(I) + 302(g) ⇄ 2CO2(g) + 4H₂O(g) + Energy
Reaction Favored | Forward
Direction of Shift | R
[CH3OH] | ↓
[02] | ↓
[CO2] | ↑
[H₂O] | ↑
Temp Change | ↓
Add CH3OH | F
Remove H₂O | R
Add CO2 | F
Increase Temp | F
Cool Reaction | R
Remove CH3OH | R
Add O2 | F
Remove CO2 | R
Decrease Pressure | F
What are reactions in equilibrium?In chemistry, a reaction in equilibrium is a state in which the rate of the forward reaction is equal to the rate of the reverse reaction, and there is no net change in the concentrations of the reactants and products over time.
At equilibrium, the concentrations of the reactants and products remain constant, and the system appears to be static. However, the equilibrium state is actually dynamic, with molecules constantly colliding and exchanging energy.
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A pharmacist needs to make a 25.0 liter of a 3.50 M solution of a substance. The stock solution of the substance is 10.5 M. How much stock and water must be mixed?
1.47 liters of stock and 16.67 liters of water
8.33 liters of stock and 16.67 liters of water
1.47 liters of stock and 25.0 liters of water
8.33 liters of stock and 25.0 liters of water
The correct answer is option (b): 8.33 liters of stock and 16.67 liters of water. . The remaining volume will be filled with water, which is 25.0 L - 8.33 L = 16.67 L.
What is Solution?
A solution is a homogeneous mixture composed of two or more substances, where one substance (the solute) is uniformly dispersed in another substance (the solvent) at the molecular or ionic level. In a solution, the particles of the solute are evenly distributed throughout the solvent, resulting in a clear and uniform mixture.
To make a 25.0 liter solution of 3.50 M concentration, using a stock solution of 10.5 M, we can use the dilution formula:
[tex]C_{1}[/tex] [tex]V_{1}[/tex]=[tex]C_{2}[/tex][tex]V_{2[/tex]
[tex]C_{1}[/tex] = 10.5 M
[tex]V_{1}[/tex] = volume of stock solution (unknown)
[tex]C_{2}[/tex] = 3.50 M
[tex]V_{2[/tex] = 25.0 L
Rearranging the formula to solve for [tex]V_{1[/tex]:
[tex]V_{1}[/tex] = ([tex]C_{2}[/tex][tex]V_{2[/tex]) / [tex]C_{1}[/tex]
[tex]V_{1}[/tex]= (3.50 M)(25.0 L) / 10.5 M
[tex]V_{1}[/tex]= 8.33 L
So, the pharmacist needs to mix 8.33 liters of the 10.5 M stock solution with water to make a 25.0 liter solution of 3.50 M concentration. The remaining volume will be filled with water, which is 25.0 L - 8.33 L = 16.67 L.
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1. Define the following: Mass Weight Inertia Inertia mass
Answer:
1. Mass - Mass is a measure of the amount of matter in an object. It is a scalar quantity, meaning that it has only magnitude, and is usually measured in kilograms.
2. Weight - Weight is the force exerted on an object due to gravity. It is the product of an object's mass and the acceleration due to gravity, and it is measured in newtons. The weight of an object can change depending on the location and gravitational field it is in, while its mass remains constant.
3. Inertia - Inertia is the resistance of an object to changes in its state of motion or rest. It is a property of matter and is related to the mass of an object. The greater the mass of an object, the greater its inertia, meaning it will be harder to start, stop, or change direction.
4. Inertial Mass - Inertial mass is a measure of the resistance of an object to acceleration or changes in its state of motion. It is equal to the ratio of the force applied to an object and its resulting acceleration. The inertial mass of an object is a fundamental property of matter and is the same as the object's gravitational mass.
Explanation:
Answer:
Mass Weight Inertia mass
MassA large body of matter with no define shape
Example
the sun broke out from behind a mass of clouds"
Weighta body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
Example
"he was at least fifteen stone in weight
Inertia MassInertial mass is a mass parameter giving the inertial resistance to acceleration of the body when responding to all types of force
What is hydrogen an example of?
O a compound
O a mixture
O an element
O a solution
Answer:
an element
Explanation: hydrogen is a basic element on the periodic table and is not combined with anything
How many grams of KCI are produced if 25.0 grams of KCIO; decompose?
15.198g of KCI are produced if 25.0 grams of KCIO; decompose. The chemical equation that KClO₃ and KCl have a mole ratio of 1:1,
In potassium chlorate particle there is one K atom,one Cl iota and three O molecule present. The formula for determining the substance's molecular weight is as follows:
No. of moles = mass of the substance ÷ Molecular mass of the substance
Decomposition reaction :The compound is broken down into simpler compounds during a decomposition reaction. In most cases, the decomposition reaction cannot be started without an external source. The outer guides like intensity, light, power and so on.
The reaction of potassium chlorate decomposition is the subject of our consideration here.
It is being broken down into potassium chloride, which has the molecular formula KCl, from potassium chlorate, which has the molecular formula KClO₃.
So first we should compose the decay of KClO₃
2KClO₃ → 2KCl+3O₂
To find the number of moles of the substance which is of concern, we use this equation,
no. of moles = Given mass of the substance / Molecular mass of the substance
The given mass of KClO₃=25g
calculating the molecular mass of KClO₃ :
The atomic mass of K is 39,
Cl is 35.5 and O is 16
Molecular mass of KClO₃ = 39+35.5+3 × (16)
=122.5g/mol
Number of moles as per equation :
no. of moles =25122.5
=0.2040mol
Now that we know from the chemical equation that KClO₃ and KCl have a mole ratio of 1:1,
Hence , KCl has a mole count of 0.2040mol.
We write an equation for the substance's weight and modify the equation for the number of moles.
no. of moles equals the given mass of the substance divided by its molecular mass.
Weight of the substance = no. of moles × molecular mass of substance
Weight of substance = 0.2040 × 74.5
= 15.198g,
Hence, 15.198g of KCI are produced if 25.0 grams of KCIO; decompose.
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