Answer: In the case of water, we know that the O-H covalent bond is polar, due to the different electronegativities of hydrogen and oxygen. Since there are two O-H bonds in water, their bond dipoles will interact and may result in a molecular dipole which can be measured.
Explanation:
Which characteristic could distinguish a crystalline solid from an amorphous
solid?
A. Molecular mass
B. The way it breaks
C. Hardness
D. Color
The characteristic that could distinguish a crystalline solid from an amorphous solid is option b. The way it breaks.
Difference between the crystalline solid and amorphous solid:Crystalline solids contained edges and faces, that should be diffracted x-rays, and have sharp melting points.
While on the other hand, amorphous solids should contain irregular does not provide well-resolved x-ray diffraction patterns.
hence, the option b is correct.
And, the rest of the options are wrong.
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Which of the following statements is true?
Question 10 options:
a chromosome is larger than a cell
a DNA strand is made of many chromosomes
a gene contains may chromosomes
a chromosome contains many genes
Answer:
a chromosome contains many genes
Explanation:
How much excess reactant remains from the reaction of 8.3g of sodium and 4.5g of chlorine?
a. 8.2g Na
b. 5.4g Na
c. 5.4g Cl2
d. 8.2g Cl2
Answer:
5.4 g Na
Explanation:
Calculate the mass of sodium chloride from both reactants. The lesser value is the amount is the theoretical yield. Subtract the mass of the calculated mass of sodium chloride from the mass of the reactants.
Help pls 50 points and brainliest.
Matter is made up of heat energy and______energy.
1. chemical
2. light
Answer:
Matter is Made up of Chemical Energy..
Answer:
[tex]\huge\boxed{\sf Chemical}[/tex]
Explanation:
Matter is made up of atoms. Atoms contain chemical bonds which hold up the atoms together. These chemical bonds store chemical energy in themselves. Hence Matter is made up of chemical energy and heat energy.
Light energy have no relation with matter. Remember, Light is not a matter and matter is not light.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807What is the average Mw for a fatty acid mixture whose fats (1 gram) required 0.0034 equivalents of NaOH to titrate. Remember: 1 Fatty acid has 1 equivalent.
1. Ew = Mw (#H+)
2. Ew = mass/eq
a.) 294.12 g/mol
b.) 145.04 g/mol
c.) 345.56 g/mol
d.) 132.04 g/mol
Answer:
a.) 294.12 g/mol
Explanation:
1 equivalent of fatty acid reacts with 1 equivalent of NaOH.
As in the titration are required 0.0034 equivalents of NaOH, the equivalents of fatty acids = moles of fatty acids are:
0.0034 moles of fatty acids
Molar mass is defined as the ratio between mass of substance in a determined amount of moles. The mass of the fats was 1 gram, that means the molar mass is:
1g / 0.0034moles =
294.12g/mol
Right option is:
a.) 294.12 g/molChemicals that control weeds are called
A. acaricides.
B. herbicides.
C. insecticides.
D. pesticides.
Answer:
The answer is D
Explanation:
because insecticides are used for insects but pesticides are used to kill off unwanted plants
Answer:
B. herbicides
Explanation:
it kills weeds.
A piston compresses the air in the cylinder by doing 61.0 J of work on the air. As a result, the air gives off 113.0 J of heat to the surroundings. If the system is the air in the cylinder, what is the change in its internal energy?
Answer:
[tex]\Delta E=-52J[/tex]
Explanation:
Hello!
In this case, since the first law of thermodynamics states that the heat added to system and the work done by the system are able to define the change in the internal energy as follows:
[tex]Q-W= \Delta E[/tex]
Since this problem shows that the system releases 113.0 J of heat, we use it negative as well as the 61.0 J of work performed on the system; therefore we write:
[tex]\Delta E=-113.0J+61.0J\\\\\Delta E=-52J[/tex]
Best regards!
Which of the following can be calculated from the mass of the reactants used in a chemical reaction?
Answer:
Three of these are correct.
Explanation:
Amount of limiting reactant used in a reaction
Theoretical yield of products
Amount of excess reactant from a reaction
The following can be calculated from the mass of the reactants used in a chemical reaction:
B. Amount of excess reactant from a reactionC. Theoretical yield of productsD. Amount of limiting reactant used in a reactionWhat is a chemical reaction?A chemical reaction is a process in which one or more than one substance that is called a reactant reacts and forms a totally different substance called the product. The reactions that occur form and break bonds that release or absorb energy.
Examples are burning, baking, or boiling.
Thus, the correct options are:
B. Amount of excess reactant from a reactionC. Theoretical yield of productsD. Amount of limiting reactant used in a reactionLearn more about a chemical reaction, here:
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The question is incomplete. Your complete question is probably written below:
Actual yield of products
Amount of excess reactant from a reaction
Theoretical yield of products
Amount of limiting reactant used in a reaction
Which is NOT a property of metals?
O ability to conduct electricity
O ability to conduct heat
O unreactivity
Omalleability
Answer:
malleability I believe.
Explanation:
Hope this helps and good luck :)
The specific heat capacity of silver is 0.24 J/°C ·g.
A) Calculate the energy required to raise the temperature of 150.0 g Ag from 273 K to 298 K.
B) Calculate the energy required to raise the temperature of 1.0 mole of Ag by 1.08C (called the molar heat capacity of silver).
C. It takes 1.25 kJ of energy to heat a sample of pure silver from 12.08°C to 15.28°C. Calculate the mass of the sample of silver.
Answer:
A) 900 J
B) 27.96 J
C) 1,628 J ≅ 1.63 kJ
Explanation:
The heat absorbed by the metal (silver) - or energy required to heat it - is calculated as:
heat = mass x Cp x ΔT
Where Cp is the heat capacity (0.24 J/°C ·g) and ΔT is the change in temperature (final T - initial T).
A) Given:
mass = 150.0 g
final T = 298 K = 25°C
initial T = 273 K = 0°C
We calculate the energy in J to raise the temperature:
heat = mass x Cp x (final T - initial T)
= 150 .0 g x 0.24 J/°C ·g x (25°C - 0°C )
= 900 J
B) Given:
moles Ag= 1.0 mol
ΔT = 1.08°C
We first calculate the mass of silver (Ag) by multiplying the moles of Ag by the molar mass of Ag (MM = 107.9 g/mol)
mass = moles x MM = 1.0 mol Ag x 107.9 g/mol Ag = 107.9 g
Then, we calculate the heat required:
heat = mass x Cp x ΔT = 107.9 g x 0.24 J/°C ·g x 1.08°C = 27.96 J
C) Given:
heat = 1.25 kJ = 1,250 J
final T = 15.28°C
initial T = 12.08°C
We first calculate the change in temperature:
ΔT = final T - initial T = 15.28°C - 12.08°C = 3.2°C
Then, we calculate the mass of silver:
mass = heat/(Cp x ΔT) = 1,250 J/(0.24 J/°C ·g x 3.2°C) = 1,628 J ≅ 1.63 kJ
Taking into account the definition of calorimetry:
A) the energy required to raise the temperature of 150 g Ag from 273 K to 298 K is 900 J.
B) the energy required to raise the temperature of 1.0 mole of Ag by 1.08 °C is 27.96 J.
C) the mass of the sample of silver is 1627.60 g.
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the expression that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
A)In this case, you know:
c= 0.24 [tex]\frac{J}{Cg}[/tex]m= 150 gΔT= Tfinal - Tinitial= 298 K - 273 K= 25 K= 25 C Being a temperature difference, it has the same value in ° C and ° K unitsReplacing:
Q= 0.24[tex]\frac{J}{Cg}[/tex] × 150 g× 25 C
Solving:
Q= 900 J
In summary, the energy required to raise the temperature of 150 g Ag from 273 K to 298 K is 900 J.
B)In this case, you know:
c= 0.24 [tex]\frac{J}{Cg}[/tex]m= 107.87 grams by definition of molar mass, this is the amount of mass a substance contains in one mole. The molar mass of Ag is 107.87 [tex]\frac{g}{mole}[/tex]ΔT= 1.08 CReplacing:
Q= 0.24[tex]\frac{J}{Cg}[/tex] × 107.87 g× 1.08 C
Solving:
Q= 27.96 J
In summary, the energy required to raise the temperature of 1.0 mole of Ag by 1.08 °C is 27.96 J.
C)In this case, you know:
Q= 1.25 kJ= 1250 Jc= 0.24 [tex]\frac{J}{Cg}[/tex]m= ?ΔT= Tfinal - Tinitial= 15.28 C - 12.08 C= 3.2 CReplacing:
1250 J= 0.24[tex]\frac{J}{Cg}[/tex] × m× 3.2 C
Solving:
m= 1250 J÷ (0.24[tex]\frac{J}{Cg}[/tex] × 3.2 C)
m= 1627.6 g
In summary, the mass of the sample of silver is 1627.60 g.
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What is the molarity of a 5mol solution in 3L?
Answer:
1.67 M.
Explanation:
M = mol/L ⇒ M = 5mol / 3L = 1.67 M
Which is the smallest measurement?
Answer:
3000mg
Explanation:
What is the electron configuration for N (nitrogen)?
A. 1s22s23s23p1
B. 1s21p5
C. 1s22s22p3
D. 1s22s22p23s1
Explanation:
₇N = 1s² 2s² 2p³
Group = 15period = 2atomic mass = 14Hydride of Nitrogen = Ammoniavalency = 3Therefore,
Option C is correct ✔
What is the shape of the waterline?
HELP IM CONFUSED I GIVE BRAINLIEST
Answer:
I⁻ , Sr²⁺ , K⁺
Explanation:
refer to the periodic table and memorize trends in charges.
Select the correct definition below for the vocabulary term Oxygen
Answer:
Explanation:
We should be offered choices since you were offered some. However I will take a chance on what you should answer.
Oxygen is a non metal. Its most common charge is -2 which means that it has taken on two electrons. It is associated with fire and is an oxidizing agent which is a substance that will take on electrons). It is very reactive.
PLEASE HURRY!!! I WILL GIVE BRAINLEIST!!!!
Study the diagram of a cell. Which structures are found in both plant and animal cells? W and X W and Z X and Y O Y and Z XN Y -W
Answer:
A I did the exam and I saw A sorry if it is wrong dont have the best of memory
Based on the activity series provided, which reactants will form products? F > Cl > Br > I CuI2 + Br2 Right arrow. Cl2 + AlF3 Right arrow. Br2 + NaCl Right arrow. CuF2 + I2 Right arrow.
Answer: Cul2 + Br2 ->
Explanation:
Answer:
i believe the answer is a
Explanation:
In like manner, represent particle diagrams that account for the fact that one volume of hydrogen combines with one volume of chlorine to form hydrogen chloride. What do you suppose is the formula of hydrogen chloride?
Answer:
According to Avogadro's law which states that equal volumes of all gases under the same condition of temperature and pressure contain equal number of molecules. Therefore, one molecule of hydrogen reacts with one molecule of chlorine to yield two molecules of hydrogen chloride.
The formula of hydrogen chloride is HCl
The particle diagram is found in the attachment below.
Explanation:
The reaction between hydrogen and chlorine to form hydrogen chloride is represented by the equation below
H₂(g) + Cl₂(g) ---> 2HCl(g)
In the reaction equation above, one mole (or one volume) of diatomic hydrogen gas reacts with one mole (or one volume) of diatomic chlorine gas to form two moles (or two volumes) of hydrogen chloride gas. This is in accordance with Avogadro's law which states that equal volumes of all gases under the same condition of temperature and pressure contain equal number of molecules.
What is required to cause change in matter
Answer:
Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). And removing energy from liquid water causes it to become ice (a solid). ... Most liquids contract as they freeze.
Explanation:
have a nice day
A rocket accelerates at 56 m/s2. It has a mass of 800,000 kg. Calculate the force (thrust) that the rocket engines must supply.
Answer:
4.5 × 10⁷ N
Explanation:
Step 1: Given data
Acceleration of the rocket (a): 56 m/s²Mass of the rocket (m): 800,000 kgStep 2: Calculate the force (F) that the rocket engines must supply
We can calculate the required force using Newton's second law of motion.
F = m × a
F = 800,000 kg × 56 m/s²
F = 4.5 × 10⁷ N
The required force is 4.5 × 10⁷ Newton.
Where does each stage of cellular respiration occur, and what happens during each stage? (15 points if answered)
Answer:
the process begins in the cloroplast and is completed in the mitocondria
Which of the following statements is not true about ions
Answer:
Cations form when an atom loses electrons.
Please help me!!!!
Use the activity series to determine if the following will react.
HCI + Zn —>
State whether they will or won't react and explain your reasoning.
Answer:
1. They will react.
2. 2HCI + Zn —> ZnCl2 + H2
Explanation:
1. From the question given above,
We can see that Zn is higher than H in the activity series.
NOTE: Elements higher (i.e at the top) in the activity series will displace those lower (i.e at the bottom) in the series. Thus, Zn is higher in the series than H. Therefore, Zn will displace H from solution. Hence, they will react.
2. The product obtained from the reaction can be seen as follow:
HCI + Zn —> ZnCl2 + H2
The above equation can be balance as follow:
There are 2 atoms of H on the right side and 1 atom on the left side. It can be balance by putting 2 in front of HCl as shown below:
2HCI + Zn —> ZnCl2 + H2
Which set of terms best defines what affects kinetic energy and potential energy, respecrively
for the following equation to be bal
Answer:
What's the rest of the question
Explanation:
What are the reactants for Stage 2 of photosynthesis, and where do they come from? (15 points if answer)
Answer: In photosynthesis, chlorophyll, water, and carbon dioxide are reactants. GA3P and oxygen are products. In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants.
Explanation: i don't really know how i did it
To solve such this we must know the concept of photosynthesis reaction. Therefore, NADPH and ATP are employed at this step to break covalent bond and build new ones.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like double displacement reaction, combination reaction.
The light-independent process, also known as dark reactions, is the second step of photosynthesis. NADPH and ATP are employed at this step to break covalent bond and build new ones.
Therefore, NADPH and ATP are employed at this step to break covalent bond and build new ones.
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for every 1lb you lose do to sweating you should consume ___ oz of water.
Answer:
For every pound lost, replace it with 16 to 20 ounces of fluid
A student in chemistry class mixes two clear solutions together. Which of the following is the best evidence that a chemical reaction has occurred?
Question 5 options:
The solutions are soluble when mixed together.
The volume of the liquids increased.
A Yellow precipitate is formed when mixed together.
One liquid is insoluble in the other liquid.
Answer:
a yellow precipitate is formed when mixed together
A student in chemistry class mixes two clear solutions together. Then, a Yellow precipitate is formed when mixed together.
What is the solution ?A particular kind of homogenous combination made up of two or more components is known as a solution. A solute is a material that has been dissolved in a solvent, which is the other substance in the combination.
In a combination called a solution, every component is well combined. Solutions can contain solids, liquids, and gases and are regarded as homogenous mixes. A solute plus a solvent makeup a solution. Any material that dissolves in a solvent is referred to as a solute.
Solid, liquid, and gaseous solutions can be classified as solutions based on the physical states of the solvent and solute. Both the solute and the solvent are in the solid state in solid solutions.
Thus, option C is correct.
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