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alekssr [168]
3 years ago
13

What action could slow a chemical reaction rate?

Chemistry
2 answers:
bija089 [108]3 years ago
6 0
A because it would help to have less of whatever is causing the reaction
weqwewe [10]3 years ago
5 0

Answer:

The correct option is a

Explanation:

Factors that affect the rate of chemical reactions are

  • surface area of reactants (solid)
  • temperature
  • pressure
  • presence of catalyst
  • concentration

The focus here will be on the options provided in the question (starting from option d)

Adding more of a substance to a mixture has nothing to do with a chemical reaction because a mixture is a combination of two or more substances that are physically combined (NOT chemically combined) and as such, the reaction rate cannot be determined/altered.

Increasing the concentration of the reactants leads to an increase in the rate of reaction as more product will be formed as a result of this. This is so because the molecules will be able to interact better because of the increase in the number of molecules present in the reaction.

Raising the temperature of a reaction causes for effective collision which causes an increase in the rate of reaction. In chemical reactions, not all collisions leads to a reaction, the collision that causes molecules to react is what is referred to as effective collision.

Lowering the pressure of a gaseous reaction reduces the number of effective collisions and hence slows down the rate of chemical reaction. This makes option a the correct option

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the volume of a substance must be measured several time during an experiment. which units should be used to measure the volume o
bija089 [108]

Answer:

Volume is often measured numerically using the International System of Units (SI unit), the cubic meter. for example volume of a cube is measured using a cubic centimeter (cm3), the metric system includes the liter (L) as a unit of volume, where one liter is the volume of a 10-centimeter cube.

3 0
3 years ago
What would make bromide salt insoluble in water?
anzhelika [568]
Its doesn't dissolve in water! 
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3 years ago
What is the pH of a solution with an [H+] of (a) 5.4 x 10-10, (b) 4.3 x 10-5, (c) 5.4 x 10-7?
IgorLugansk [536]

Answer:

a. 9.2

b. 4.4

c. 6.3

Explanation:

In order to calculate the pH of each solution, we will use the definition of pH.

pH = -log [H⁺]

(a) [H⁺] = 5.4 × 10⁻¹⁰ M

pH = -log [H⁺] = -log 5.4 × 10⁻¹⁰ = 9.2

Since pH > 7, the solution is basic.

(b) [H⁺] = 4.3 × 10⁻⁵ M

pH = -log [H⁺] = -log 4.3 × 10⁻⁵ = 4.4

Since pH < 7, the solution is acid.

(c) [H⁺] = 5.4 × 10⁻⁷ M

pH = -log [H⁺] = -log 5.4 × 10⁻⁷ = 6.3

Since pH < 7, the solution is acid.

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3 years ago
Hydrogen reacts with iodine to form hydrogen iodide: H2[g] + 12[g] = 2H1[g] The
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Answer:

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In which environment would primary succession occur?
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an area of exposed rock after a glacier melts away

Explanation:

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