In chemistry, bond strength is the force that a chemical bond uses to hold two atoms together.
The bond dissociation energy, or the amount of energy needed to break a certain covalent bond in a mole of molecules, is a measure of a covalent bond's strength. Multiple bonds between the same atoms are more powerful than a single bond.
Chemical reactions that release energy are known as exothermic reactions. Light or heat are released as a result of this interaction. Energy is used in an endothermic reaction. Enthalpy, or delta H, is the change in heat energy. The reaction is exothermic if the product enthalpies are more than the total of the reactant enthalpies. The process is endothermic if the products side has a higher enthalpy than the process side. As a result, the reaction is exothermic if delta H is negative. A process is endothermic if delta H is positive.
Exothermic are: A+BC -> AB+C A2+B2 -> 2AB
Endothermic are: AB+C -> AC+B A2 + C2 -> 2AC B2+C2 -> 2BC
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The complete question is
Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released)
endothermic
B2+C2-->2BC
A+BC-->AB+C
exothermic
AB+C-->AC+B
A2+C2-->2AC
A2+B2-->2AB
fill in the blank. After a recrystallization, a pure substance will ideally appear as a network of ___________. If this is not the case, it may be worthwhile to reheat the flask and allow the contents to cool more __________
A pure substance should ideally show up as a network of big crystals after recrystallization. If not, it might be beneficial to reheat the flask and let the contents cool more gradually.
Recrystallization is the process through which crystal structure's grain grains adopt a new structure or new crystal form. Recrystallization is a process that is difficult to define precisely because it is closely related to a number of other processes, most notably recovery and grain growth. As soon as boiling is observed during recrystallization, solvent should be added to the mixture. More solvent should be added as soon as boiling starts up again. The solution is homogenized by repeating this process.
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12 A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm³ samples of sulfuric acid at different temperatures. Which piece of apparatus does the student not need? A balance B measuring cylinder с stop-clock D thermometer
Using 10 cm3 samples of sulfuric acid at various temperatures, a student conducts an experiment to determine how quickly 3 cm sections of magnesium ribbon dissolve in the solution. The pupil does not require a balance equipment.
Explain about the sulfuric acid?
With the chemical formula H2SO4, sulfuric acid is a mineral acid. The names Mattling acid and Oil of Vitriol are other names for sulfuric acid. It is highly caustic and acidic in nature. It dehydrates and oxidize when present in higher amounts.
Sulfuric acid (H2SO4), often known as oil of vitriol in the past, is an inorganic chemical that is highly corrosive and powerful. It is a viscous liquid that smells ethereal and pungent and ranges in color from colorless to slightly yellow. It is soluble in water at all concentrations.
Sulfuric acid is a concentrated acid that is very reactive and dissolves most metals. It also oxidises, dehydrates, or sulfonates the majority of organic molecules and frequently results in charring. Alcohol and water react aggressively with sulfuric acid to release heat.
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consider the combustion of ethane reaction below for the next two questions. 2 c2h6 (g) 7 o2 (g) 4 co2 (g) 6 h2o (g) reaction is at standard temperature and pressure and all reagents are in the gas phase. if we react 14 moles of oxygen with 5 moles of ethane, how many moles of carbon dioxide would we make?
if we react 14 moles of oxygen with 5 moles of ethane, 10 moles of carbon dioxide would we make
From the balanced equation provided, we know that for every 2 moles of ethane that react, 4 moles of carbon dioxide are produced. So, if we have 5 moles of ethane, we can calculate the number of moles of carbon dioxide produced by multiplying the number of moles of ethane by the coefficient of carbon dioxide in the balanced equation. So, 5 moles of ethane * 4 moles of CO2/2 moles of ethane = 10 moles of CO2. A balanced equation is a chemical equation in which the number of atoms of each element on the reactant side is equal to the number of atoms of that element on the product side. This means that the equation shows the correct ratio of the elements that are involved in the reaction. In this case, the balanced equation for the combustion of ethane is 2C2H6 + 7O2 -> 4CO2 + 6H2O
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which of the following is an example of synthesizing information? (required)making connections between the history of housing policies and current housing trends.applying knowledge of basic chemistry from an introductory course towards understanding information in an advanced organic chemistry classing to a conclusion about candidates running for election based on reading multiple viewpoints on their platforms.
An example of synthesizing information is applying knowledge of basic chemistry from an introductory course towards understanding information in an advanced organic chemistry.
What happens when information is combined?When you synthesise knowledge, you take particular ideas and take them into account collectively to comprehend how they compare, contrast, and relate to one another. Students can get information from several sources and put it all together by synthesising it. When these sources are merged, a single, coherent concept is produced. This is the normal method used in class to teach students new concepts, theories, and knowledge.
What is an illustration of information synthesis?Making connections or putting things together is all that is required. We instinctively combine information to assist others in making connections between various concepts. Synthesis occurs, for instance, when you tell a friend what a number of other friends have remarked about a music or movie.
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One result of climate change is that ocean temperatures are increasing. If the temperatures continue to rise, what effect will that have on the oceans’ ability to retain CO2? How might this change affect the atmosphere?
Sea level rise, ocean heat waves, coral bleaching, and the melting of ocean-terminating glaciers and ice sheets around Greenland and Antarctica are all effects of rising ocean heat content.
What is the impact of climate change on the ocean?About 90% of the heat produced by growing emissions has already been absorbed by the ocean as of today. Unprecedented cascade repercussions result from the ocean's temperature shift as a result of the extra heat and energy.
What causes an increase in ocean temperature?Sea surface temperatures are rising and the sea level is rising as a result of the oceans absorbing more heat as a result of greenhouse gas emissions. Climate patterns will shift as a result of changes in ocean temperatures and currents brought on by climate change.
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For the following electrochemical cell Co(s)|Co2 (aq, 0.0155 m)||ag + (aq, 3.50 m)|ag(s). What is the net cell equation?
For the following electrochemical cell Co(s)|Co2 (aq.), 0.0155 m)||ag + (aq.), 3.50 m)|ag(s), the net cell equation Co(s) + [tex]Ag^{+}[/tex](aq.) → 2Ag(s) + [tex]Co^{+2}[/tex](aq.).
An electrochemical cell is what?An electrochemical cell is a structure that can use electrical energy to assist chemical reactions inside of it or create electrical energy from those reactions. These gadgets can change chemical energy into electricity or vice versa.
The significance of electrochemical cellsElectrochemical cells are necessary in modern society, especially for energy storage. Electrochemical cells, including such batteries, can store energy from erratic energy sources like the sun and wind on a large scale.
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What is the enthalpy of the overall chemical reaction Upper C upper H subscript 4 (g) plus 4 upper C l subscript 2 (g) right arrow upper C upper C l subscript 4 (g) plus 4 upper H upper C l (g).
-205.7 kJ The final enthalpy will be:The enthalpy of the second intermediate equation is halved and has its sign changed.
What is the whole chemical reaction's enthalpy?The entropy of reaction (Hrxn) for a chemical reaction is indeed the differential in enthalpy between the products and reactants; Hrxn is measured in kilojoules per mole.
What is the response to the enthalpy of reaction?A change inside the enthalpy of the a reaction that takes place at constant pressure is known as the Reaction Heat (also known as the Enthalpy of Reaction).It is a thermal measurement unit that can be used to determine how much energy is released or created per mole during a reaction.
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select the best statement. multiple choice chemical changes provide the only valid basis for identification of a substance. chemical changes are easily reversed by altering the temperature of the system. chemical changes always produce substances different from the starting materials. chemical changes are associated primarily with extensive properties. chemical changes are accompanied by changes in the total mass of the substances involved.
The best statement is chemical changes are easily reversed by altering the temperature of the system and chemical changes are associated primarily with extensive properties.
Extensive properties: what are they?The amount of materials in a sample can affect a property known as an extensive property. Examples of extensive attributes include mass and volume. A material's intense properties are those that are solely dependent on the type of sampled material and not on its quantity.
When would the system's temperature start to drop?Temperature is an indicator of the system's atoms' or molecules' typical kinetic energy. The system's temperature drops due to adiabatic expansion. The temperature stays the same during an isothermal process. An adiabatic compression raises the system's temperature.
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action of sulfur trioxide with atmospheric water droplets results in sulfuric acid, a contributor to acid rain. according to the equation below, how many moles of sulfuric acid can you predict will be formed from 58.0 g of so3 and an excess of water?
The moles of sulfuric acid will be formed from 58.0 g of so3 in water is found to be 0.724⋅mol.
How does acid rain work?Sulfur dioxide (SO2) and nitrogen oxides (NOX) that are released into the atmosphere and carried by air currents and wind result in acid rain. Acids made of sulfuric and nitric compounds are produced when the SO2 and NOX react with oxygen, water, and other substances. Before dropping to the ground, they then combine with water and other substances.
Moles of sulfur trioxide=58.0⋅g/80.07⋅g⋅mol−1 = 0.724⋅mol .
Sulfur trioxide causes acid rain in what way?Inhaling sulphur trioxide fumes can be harmful and result in burns to the skin and internal organs. Acid rain is a result of sulphur oxides combining with water vapour in the atmosphere to form sulfuric acid.
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If we react 10 moles of hydrogen with 6 moles of oxygen. what is the limiting reagent and how much water is produced?
The limiting reagent in this reaction is hydrogen because it is the reactant that is used up first.
The balanced equation for the reaction between hydrogen and oxygen to form water is:
2H2 + O2 -> 2H2O
To react 10 moles of hydrogen with 6 moles of oxygen, we will also need 6 moles of oxygen.
Since we have enough hydrogen and oxygen to react completely, we can calculate the number of moles of water produced.
10 moles of H2 will react to produce 10 moles of H2O and 6 moles of O2 will react to produce 3 moles of H2O. Therefore, the total amount of water produced is 10 + 3 = 13 moles of water.
Two students investigated the electrolysis of copper sulfate solution. When copper sulfate solution is electrolysed, copper is produced at the negative electrode What substance is produced at the positive electrode when copper sulfate solution is electrolysed
Oxygen gas is produced at the positive electrode of the solution.
What is produced?We know that the term electrolysis has to do with the process by which we can be able to cause the splitting of a compound that is ionic when we pass a direct current through the solution of the compound.
Now we know that at the negative electrode, we are going to have the copper metal that is discharged but at the positive electrode, we are going to have the discharge of oxygen gas. This is because it is higher in the series than sulfate ions.
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explain why hydrogen fluoride, hf, and water, h2o, are very polar molecules but tetrafluoromethane, cf4, and carbon dioxide, co2 are non- polar.
Answer: :)
Explanation:
turn on show valence electrons. what do you notice at the very top of the nitrogen atom, and how does this feature explain why the molecule is polar?
At the very top of the nitrogen atom there are three dots, representing the three valence electrons of the nitrogen atom.
What is valence electrons?Valence electrons are the electrons that are present in the outermost shell of an atom. They are responsible for the chemical properties of the atom and determine how the atom will interact with other atoms in a chemical reaction. Valence electrons are important because they provide the atom with a certain degree of stability and determine its reactivity. Valence electrons are located in the outermost electron shell, so they are the most easily accessible to other atoms.
This feature explains why the molecule is polar because the three electrons create an uneven distribution of charge, giving the molecule a positive and negative end, making it polar.
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what are multivalent elements and polyatomic ions?
Multivalent elements are metals that can form more than one stable ion charge. Polyatomic ions are ions that consist of more than one atom.
What are polyatomic ions?The primary distinction between a multivalent element and a polyatomic ion is that multivalent elements have several valencies, whereas polyatomic ions contain multiple atoms that are covalently bound to each other. The prefix "multi-" means "many".
The normal ion has only one element, chlorine. The polyatomic ion contains two elements: chlorine and oxygen.
Therefore, metals that can create more than one stable ion charge are known as multivalent elements. Polyatomic ions are ions with more than one atom.
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Sulphur burns in air to form sulphur dioxide: S+O2→SO2. What is the mass of sulphur that must be burned to produce 64g of sulphur dioxide?
It takes 1 mol of sulfur to produce 1 mol of sulfur dioxide. Therefore, 64 g of sulfur is required to produce 64 g of sulfur dioxide.
To calculate the mass of sulfur required to produce 64 g of sulfur dioxide, the following equation can be used:
m (sulfur) = (64 g SO2) / (32 g/mol SO2) × (1 mol S/ 32 g S) = 2 mol S
Therefore, the mass of sulfur required to produce 64 g of sulfur dioxide is 2 mol S or 64 g.
The mass of sulfur that must be burned to produce 64 g of sulfur dioxide is 64 g. This is because the molar mass of sulfur dioxide is 32 g/mol and the molar mass of sulfur is 32 g/mol.
Therefore, it takes 1 mol of sulfur to produce 1 mol of sulfur dioxide. Therefore, 64 g of sulfur is required to produce 64 g of sulfur dioxide.
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What are hydroscopic salts?
Answer:
A hygroscopic salt is a salt that can absorb water
Explanation:
This water usually comes from water vapor in the atmosphere and the process occurs at room temperature. Once the water is absorbed, the physical properties of the salt, like color and viscosity, may change.
sorry if wrong im trying my best forgive me
Answer:
A hygroscopic salt is a salt that can absorb water. This water usually comes from water vapor in the atmosphere and the process occurs at room temperature. Once the water is absorbed, the physical properties of the salt, like color and viscosity, may change. However, the hygroscopic substance does not dissolve.
Hygroscopy - A substance that has the ability to adsorb and absorb moisture or water from the surrounding environment is known as hygroscopic and its property is called hygroscopy. Examples - Silica gel, honey, methanol, concentrated sulphuric acid, glycerine, ethanol, etc.
Explanation:
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Which of the following compounds contains an ion wvith a +3 charge? la) NOa (b) Mn_Oa (c) BaCIO3 (d) FejPz le) all of them have +3 charge
The compound that contains an ion with a +3 charge is FejPz. So option D is correct.
FejPz is an Iron(III) Phosphide, and the Iron ion in it has a +3 charge. Iron can have multiple oxidation states and the +3 oxidation state is one of them.
NOa is Nitrite, Nitrite is a neutral compound and doesn't contain any ion with a +3 charge
Mn_Oa is Manganese (IV) oxide, and Manganese in it has a +4 charge.
BaCIO3 is Barium Carbonate which is a neutral compound as well and doesn't contain any ion with a +3 charge.
Therefore, the compound FejPz is the one containing an ion with a +3 charge.
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predict whether the following reactions are possible. Explain
your answers.
a. Ni(s) + MgSO4(aq) →→→→ NiSO4(aq) + Mg(s)
b. 3Mg(s) + Al₂(SO4)3(aq) →→→→ 3MgSO4(aq) + 2Al(s)
c. Pb(s) + 2H₂O(1)→→→→ Pb(OH)₂(aq) + H₂(g)
Help please!!!!
Answer:
A - not possible, B - possible, C- possible
Explanation:
You need to consider the reactivity series table. Check the attachment below.
A. If you see in the table, nickel is way below magnesium, meaning less reactive, and hence will not be able to snatch SO4 away from magnesium because it is not reactive enough so A is wrong.
B. Magnesium is more reactive than aluminium as mag appears right above alum, so yes possible.
C. Pb is lead which is more reactive than hydrogen so C is also possible.
Part A: Determine [OH−] of a solution that is 0.300 M in HCO3−. (Ka1 for H2CO3 is 4.3×10^−7.) Express your answer in molarity to two significant figures.
Part B: Determine the pH of this solution.
[ OH−] of a solution that is 0.300 M in HCO3− is 3.24×10^-8 Molarity. and the oh of the solution is 7 .49
Part A: We know that HCO3- is a weak base, so it can be converted to H2CO3 (carbonic acid) through the following equilibrium:
HCO3- + H2O <=> H2CO3 + OH-
The Ka1 for H2CO3 is 4.3×10^-7, so we can use the following expression to find the [OH-]:
[H2CO3][OH-] = Ka1 * [HCO3-]
[OH-] = Ka1 * [HCO3-] / [H2CO3]
Since [H2CO3] is equal to [HCO3-], we can simplify this to: [OH-] = Ka1 * [HCO3-]^2
[OH-] = (4.3×10^-7) * (0.300)^2[OH-] = Ka1 * [HCO3-]^2 [OH-] = (4.3×10^-7) * (0.300)^2
[OH-] = 3.24×10^-8 M. So the [OH-] of the solution is 3.24×10^-8 Molarity.
Part B: To find the pH of the solution, we need to find the negative log of the [OH-].
pH = -log([OH-])
pH = -log(3.24×10^-8)
pH = 7.49
So the pH of the solution is 7.49.
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If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure?
A) Octane
B) Ethane
C) Butane
D) All the gases will condense at the same pressure
If the pressure of the each gas is increased at a constant temperature until condensation occurs, Then a) octane will condense at the lowest pressure.
Condensation is the process by which water vapor in the air is converted to liquid water. It is the opposite of evaporation. Condensation is essential for the water cycle as it causes the formation of clouds. Condensation is the process by which the physical state of matter changes from the gas phase to the liquid phase. For example, condensation occurs when water vapor (a gas) in the air contacts a cooler surface and turns into liquid water. Octane is a gasoline additive that modern engines need to function properly. Sources of octane have taken many forms over the years. Ocatne will condense at the lowest pressure.
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the precise weight of a mole of some pure elements like silicon (si) can vary slightly from the standard atomic mass, or even from sample to sample. why?
The element may have multiple stable isotopes, and the isotopic composition may vary from sample to sample.
Isotopes are two or more atom types that have the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element, but differ in nucleon numbers (mass numbers) because they have varying quantities of neutrons in their nuclei. Each isotope of a specific element has virtually identical chemical properties, but they vary in terms of their atomic weights and other physical attributes. The total number of protons in the nucleus plus the total number of electrons in a neutral (non-ionized) atom make up an atom's atomic number.
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(7) seven importance of chemistry in our everyday life
Answer:
Knowing chemistry can help you make decisions
Answer:
1 ) chemistry plays a role in the manufacturing of medicines
2 ) chemistry plays a role in the production of cosmetics
3 ) chemistry plays a role in the production of soaps and detergents
4 ) chemistry is used to manufacture construction materials
5 ) chemistry allows us to use fuels
6 ) chemistry is important in agriculture ( providing fertilizers ... )
7 ) chemistry is important in textiles
For a theoretical yield of 5.3 g and actual yield of 4.00551 g, calculate the percent yield for a chemical reaction.
Select all that apply
To calculate the percent yield for a chemical reaction, you need to know the theoretical yield and the actual yield of the product.
The percent yield is calculated using the following formula:
% yield = (actual yield / theoretical yield) x 100
In this case, the theoretical yield is 5.3 g and the actual yield is 4.00551 g.
So, the percent yield is:
% yield = (4.00551 g / 5.3 g) x 100 = 75.59 %
Therefore, the percent yield for the chemical reaction is 75.59%.
It's important to note that percent yield is a measure of the efficiency of a chemical reaction, it is the ratio of the actual yield of product to the theoretical yield, multiplied by 100. The theoretical yield is calculated from the stoichiometry of the balanced equation for the reaction, and the actual yield is the amount of product obtained in the laboratory. A yield of 100% indicates that all the reactant has been converted to product, while a yield less than 100% means that some of the reactant has been lost or wasted, and a yield greater than 100% is not possible in real chemistry.
f the original mass of wo3 is 37.0 g, how many grams of co2 must be collected from the reaction in order to infer that the solid that remains is pure tungsten
11 grams of CO2 must be collected from the reaction in order to infer that the solid that remains is pure tungsten.
What is chemical reaction example?A chemical reaction is a process in which reactants react chemically and convert into products by chemical transformation. For example, Respiration – we inhale oxygen which reacts with glucose and produces carbon dioxide, water and energy.
How does a chemical reaction start?When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
Given:
WO3 = 37.0 g
Chemical reaction,
2WO3(s) + 3C(s) ↔ 2W(s) + 3CO2(g)
(37 grams WO3) / (232 grams) = 0.159 moles WO3(0.159 moles WO3) x (3 moles CO2 / 2 moles WO3) = 0.239 moles CO2(0.239 moles CO2) x (44 grams CO2) = 10.5 grams
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the stock buffer solution contains 1.00 m na2co3 and 0.143 m nahco3. calculate the milliliters of stock buffer needed to prepare 500 ml of buffer containing 0.0125 m bicarbonate ion
Moles of bicarbonate ion in 500 mL of desired solution = (0.0125 mol/L) × (0.500 L) = 0.00625 mol
What is solution?A solution is a means of solving a problem or addressing an issue. It can range from a simple, practical solution to a complex scientific or technological solution. Solutions are often creative, and the best solutions often involve collaboration and the sharing of ideas and resources.
Moles of bicarbonate ion in 1 L of stock buffer solution = (1.00 mol/L Na2CO3) × (2 mol HCO3-/1 mol Na2CO3) + (0.143 mol/L NaHCO3) × (1 mol HCO3-/1 mol NaHCO3) = 2.286 mol/L
Moles of bicarbonate ion in 500 mL of stock buffer solution = (2.286 mol/L) × (0.500 L) = 1.143 mol
Moles of bicarbonate ion needed from stock buffer solution to make 500 mL of desired solution = 0.00625 mol
Milliliters of stock buffer solution needed = (0.00625 mol/1.143 mol) × (500 mL) = 54.2 mL
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Find the percentage dissociation and hydrogen ion concentration of 0.2 mol/dm^3 of ethanoic acid if the equilibrium constant of acid is 1.85x10^-5 mol/dm^3
The percentage dissociation is 0.97% and the hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.
To find the percentage dissociation and hydrogen ion concentrationwe need to use the equation:
Ka = [H^+][A^-] / [HA]
where Ka is the equilibrium constant, [H^+] is the hydrogen ion concentration, [A^-] is the concentration of the dissociated form of the acid (acetate ion), and [HA] is the concentration of the undissociated form of the acid (ethanoic acid).
We know the concentration of ethanoic acid, [HA] = 0.2 mol/dm^3, and the value of the equilibrium constant, Ka = 1.85 x 10^-5 mol/dm^3.
Using the equation:
Ka = [H^+][A^-] / [HA]
1.85 x 10^-5 = [H^+][A^-] / 0.2
[H^+][A^-] = 1.85 x 10^-5 * 0.2
[H^+][A^-] = 3.7 x 10^-6 mol^2/dm^6
Since the concentration of the acetate ion is equal to the concentration of the hydrogen ion, [A^-] = [H^+].
So,
[H^+]^2 = 3.7 x 10^-6 mol^2/dm^6
[H^+] = sqrt(3.7 x 10^-6) = 1.93 x 10^-3 mol/dm^3
The hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.
To find the percentage dissociation, we divide the concentration of the acetate ion by the initial concentration of ethanoic acid and multiply by 100:
Percentage dissociation = ([A^-] / [HA]) * 100
Percentage dissociation = (1.93 x 10^-3 / 0.2) * 100 = 0.97%.
Therefore, The percentage dissociation is 0.97% and the hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.
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Assuming that the Aufbau Principle is followed, what is the expected electronic configuration of the element with atomic number Z = 116?
The expected electronic configuration of the element with atomic number Z = 116 is [Rn] 5f14 6d10 7s2 7p4. This is based on the Aufbau Principle, which states that electrons occupy the lowest energy orbitals available, starting with the lowest energy orbital.
The element with atomic number Z = 116 is Ununhexium (Uuh). Its electronic configuration follows the general pattern of the periodic table, with the outermost shell being the 7th shell. This is because the element is placed in the 6th period of the periodic table. The electronic configuration is the same as that of Radon (Rn), with the addition of two electrons to the 7s orbital.
The expected electronic configuration of Uuh is [Rn] 5f14 6d10 7s2 7p4, which is the same as that of Radon with the addition of two electrons to the 7s orbital. The 7s orbital has the highest energy level among the s orbitals and the 7p orbitals. Thus, the two electrons will be added to the 7s orbital to maximize stability.
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if each water molecule donates one electron, what mass of water lost an electron to the lightning? one mole of water has a mass of 18 g.
(-25C / 1) 1 electron divided by 1.60x 1019 C results in 1.6 x 1020 electrons. Water has a mass of 18 g per mole. (1 / (1.6 x 1020 electrons) 1 molecular to 1 electron (6.02 x 1023 molecules/one mole) 4.8 x 103 g = (18g/mole)
An electron is who or what it is:It is possible for an electron, a negatively charged subatomic particle, to be either free or bonded to an atom (not bound). An electron is attached to an atom and is one of the three major types of particles in an atom.
What are the functions of atoms and electrons?A positively charged atom's structural constituents are called electrons. An atom's total negative charge of its electrons equals the positive charge of its protons in the atomic nucleus.
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you have been asked to develop a 2m solution of naoh that will be used in an acid-base neutralization reaction for emergency spill response. if you need to have 1 l of the solution available, how much naoh will you need to dissolve in water to achieve this concentration?
To make a 2M solution of NaOH, you will need to dissolve 2 moles of NaOH in every liter of water.
What is dissolve?Dissolve is a process in which a solid substance is broken down into smaller particles and mixed with a liquid so that it becomes evenly distributed. This process can be used to mix ingredients, create a solution, or even to form a new substance. Dissolving occurs when the molecules of a solid substance become attracted to the molecules of a liquid. The combination of the two materials results in the liquid taking on the properties of the solid.
Since you need 1L of the solution, you will need to dissolve 2 moles of NaOH in that liter of water.
This means that you will need to add 40g of NaOH (2 moles x 20 g/mol) to 1 liter of water to achieve a 2M solution.
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Write balanced net ionic equations for the reactions that occur when the following aqueous solutions are mixed. If no reaction is likely to occur, so indicate.
Silver nitrate (AgNO3) and calcium chloride (CaCl2): No reaction is likely to occur.
What is reaction?Reaction is the way that one object or organism responds to a stimulus. It can be either physical or psychological and can involve the body's physiological systems, such as the nervous system, or the body's psychological systems, such as the cognitive or emotional system. Reactions are often automatic and instinctive and can occur in response to both external and internal stimuli. Reactions can vary widely and can be either positive or negative. Examples of reactions include fear, anger, joy, disgust, surprise and sadness.
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