CHEMISTRY HIGH SCHOOL

If you use half as many moles of reactant *then: you'll make twice as much money
the reaction won't happen
the reaction will release half as much heat
the reaction will absorb heat

Answers

Answer 1

Answer: The reaction will release half as much heat

Answer 2

Answer:

Answer:

The reaction will release half as much heat

Explanation:

Because there are less reactants the amount of energy released will decrease. Because the reactants halves the amount of heat released also halves.

Related Questions

The concentration of an acid or base is defined as the ratio of the amount ofO A. solvent to the amount of solute in a solutionO B. conjugate acid to conjugate baseO C. conjugate base to conjugate acidOD. solute to the amount of solvent in a solution
Sulfur and magnesium both have two valence electrons. a. True b. False
A student designs an experiment where she will put the same amount of air into three different balloons. One balloon will be submerged in ice water, oneballoon will be carefully heated with a hair dryer, and the last balloon will be left alone. After making the changes, the student then will then measure the diameter of each balloon. The dependent variable is:A)The temperature of the balloonB)The diameter of the balloonC)The amount of airD)The three balloons
A student is running an experiment in which 60.3 grams of LiCl is needed, but the only jar of reagent in the lab is labelled lithium chloride monohydrate. How many grams of the hydrate must the student weigh out in order to get the desired amount of the anhydrous compound?
Chemists use activity series to determine whether which type of reaction will occur?

Which is the best metal to use in an alloy to increase its electrical conductivity

Answers

Copper would be the best

Silver, Copper, Gold, Aluminum, and brass are the top best conductors in that order. Silver being best and brass still being good but not better than the others. I would try you luck with silver and copper the most.

How is geometrical symmetry related to the polarity of a molecule?

Answers

A symmetric shape means the bonds' polarities are exactly equal then it means the polarities cancel each other, resulting to a nonpolar molecule. This is because there will be no available polarity for other substance to attach.

Explanation :

As we know that the geometrical symmetry of the molecule and the polarity of the bonds both are equally important for determining the polarity of the molecule.

The molecule that has zero dipole moment that means it is a geometrical symmetric molecule and the molecule that has some dipole moment that means it is a geometrical asymmetric molecule.

As the molecule is symmetric, the dipole moment will be zero and the molecule will be non-polar.

As the molecule is asymmetric, the dipole moment will not be zero and the molecule will be polar.

Thus, we can say that the a symmetry molecule is non-polar in nature and an asymmetry molecule is a polar molecule.

Compared to the freezing point of 1.0 M KCl(aq) at standard pressure, the freezing point of 1.0 M CaCl2(aq) at standard pressure is(1) lower
(2) higher
(3) the same

Answers

Answer : The correct option is, (1) lower

Explanation :

Formula used for lowering in freezing point :

$\Delta T_f=i* k_f* m$

where,

$\DeltaT_b$ = change in freezing point

$k_b$ = freezing point constant

m = molality

i = Van't Hoff factor

According to the question, we conclude that the molality of the given solutions are the same. So, the freezing point depends only on the Van't Hoff factor.

Now we have to calculate the Van't Hoff factor for the given solutions.

(a) The dissociation of $KCl$ will be,

$KCl\rightarrow K^++Cl^-$

So, Van't Hoff factor = Number of solute particles = 1 + 1 = 2

(b) The dissociation of $CaCl_2$ will be,

$CaCl_2\rightarrow Ca^(2+)+2Cl^-$

So, Van't Hoff factor = Number of solute particles = 1 + 2 = 3

The freezing point depends only on the Van't Hoff factor. That means higher the Van't Hoff factor, lower will be the freezing point and vice-versa.

Thus, compared to the freezing point of 1.0 M $KCl(aq)$ at standard pressure, the freezing point of 1.0 M $CaCl_2(aq)$ at standard pressure is lower.

Is Squeezing oranges to make orange juice a chemical or physical change?

Answers

This would be a physical change because despite the fact the juice has been squeezed out of it, the orange is still an orange. A physical change is when something changes matter, like a solid to a liquid or a liquid to a gas. Since it's been changed from a solid orange to liquid juice, it's a physical change.

Hope I helped! :)

squeezing just the juices out of the orange, like with your hand or whatever you use, is a physical change. yes :)

Which pair of elements will form an ionic bond?N and O
K and Br
C and Cl
Fe and Ni

Answers

K and Br can form an ionic bond. Since potassium is a metal (has a small electronegativity) and bromine is a nonmetal (has a large electronegativity), potassium can give an electron to bromine creating potassium bromide.

I hope this helps. Let me know if anything is unclear.

Final answer:

Ionic bonds are formed between a metal and a nonmetal. Among the pairs given, K and Br satisfy these conditions and will form an ionic bond.

Explanation:

The question is asking about ionic bonds, which are formed when one atom donates an electron to another atom. This occurs between a metal and a nonmetal due to their differences in electronegativity.

Looking at the options, N and O are both nonmetals, C and Cl are also both nonmetals, and Fe and Ni are both metals, so they would not form ionic bonds. On the other hand, K (a metal) and Br (a nonmetal) have a difference in electronegativity such that K can donate an electron to Br, forming an ionic bond. Therefore, the pair that would form an ionic bond is K and Br.

Learn more about Ionic Bonds here:

brainly.com/question/18297125

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Which statement most accurately describes the behavior of a catalyst? (A) A catalyst increases the ∆G of a reaction and hence the forward rate.
(B) A catalyst reduces the ∆H of a reaction and hence the temperature needed to produce products.
(C) A catalyst reduces the activation energy for a reaction and increases the rate of a reaction.
(D) A catalyst increases the equilibrium constant and final product concentrations