CHEMISTRY HIGH SCHOOL

The activation energy of a chemical reaction can be decreased by the addition of(1) a catalyst (3) electrical energy
(2) an indicator (4) thermal energy

Answers

Answer 1
Answer: A CATALYST would decrease the activation energy of a reaction thus creating an alternate pathway for the reaction to occur

Related Questions

Which of the following is untrue concerning a reversible reaction?a. All reversible reactions will reach equilibrium. b. The reaction always spends equal time in the forward and reverse direction. c. There is equal processing for the concentration of reactants and products. d. The reaction could spend more time in the reverse direction than in the forward direction.
The best method of developing a paragraph about a landscape would be _____.chronological spatial particular contrast
Copper, silver, and nickel are all classified as
According to the following balanced equation, 2 formula units of Iron (III) Oxide (Fe2O3) can be formed by reacting 4 atoms of iron (Fe) with 3 molecules of oxygen gas (O2). If 12 atoms of iron are reacted with 6 molecules of oxygen gas, which is the limiting reactant and how many atoms or molecules will be left over? 4Fe + 3O2 -> 2Fe2O3
Calculate the mass percent of hydrogen in diethyl ether. Round your answer to the nearest percentage.

The recommended daily requirement of calcium is1,000 mg. Tap water in a Midwestern city contains approximately 150 mgCa/L. A person living in the city who drinks two liters of water in oneday would receive ________ percent of his/her RDA of calcium. A. 3
B. 7.5
C. 15
D. 30

Answers

The answer is D. 30 percent

In general, if the temperature of a chemical reaction is increased, the reaction ratea. increases.
b. decreases.
c. remains the same.
d. cannot be predicted.

Answers

In general, if the temperature of a chemical reaction is increased, the reaction rate increases as well. The correct answer is A.

State, in terms of the arrangement of atoms, the difference in hardness between diamond and graphite.

Answers

The difference in hardness between diamond and graphite is that diamond has an ordered arrangement of atoms within its structure that makes it harder and stronger than graphite. This is due to the high pressure and high temperature that it went.

Final answer:

Diamond is significantly harder than graphite due to its tightly packed arrangement of atoms, while graphite is soft and slippery because of its layered structure.

Explanation:

The difference in hardness between diamond and graphite can be explained by their arrangement of atoms. In diamond, each carbon atom is bonded to four neighboring carbon atoms in a tetrahedral arrangement, creating a rigid and tightly packed structure. This arrangement gives diamond its hardness. On the other hand, in graphite, each carbon atom is bonded to only three neighboring carbon atoms, forming layers that are held together by weak forces called van der Waals forces. These layers can slide past each other easily, making graphite soft and slippery.

Learn more about Hardness difference between diamond and graphite here:

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The image is of the formation of a fault-block mountain.Which of these most likely occurs to result in the
formation of these mountains?
O The crust is compressed
O The crust does not spread apart
The center block is forced upward.
The hanging walls from the two parallel faults slip down​

Answers

The Formation of these mountains will be caused by

  • The crust does not spread apart
  • The center block is forced upward.
  • The hanging walls from the two parallel faults slip down​

Options B, C, and D is correct.

What are mountains?

Generally, a mountain is simply defined as a body that rises dramatically above its surroundings and is distinguished by steep slopes.

In conclusion, Mountains are formed from the formation of rocks over years in an Environment.

Read more about Environment

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Answer:

d.

Explanation:

The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a ____a. combination reaction.
b. decomposition reaction.
c. single-replacement reaction.
d. double-replacement reaction.

Answers

Answer: c. single-replacement reaction.

Explanation:

Combination is a chemical reaction in which two or more than two substances combine to form a single product.

A+B\rightarrow AB

Decomposition is a chemical reaction in which one substance decompose to form two or more than two products.

AB\rightarrow A+B

A single replacement  is a chemical reaction in which a more reactive element displaces a less reactive element from its salt solution, thus one element reacts with a compound to form a new compound and a different element.

A+BC\rightarrow B+AC

Double displacement is a chemical reaction in which ion exchange takes place.

AB+CD\rightarrow AD+BC
C. single replacement. A single replacement is represented by this formula : AB + C = AC + B

What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?

Answers

Mi * Vi = Mf * Vf

2.5 * Vi = 0.50 * 100.0

2.5 Vi = 50

Vi = 50 / 2.5

Vi = 20 mL

hope this helps!

Answer:

20 milliliters

Explanation:

I don't cap
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