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maxonik [38]
3 years ago
14

Place an X next to each action that would most likely increase the reaction rate.

Chemistry
1 answer:
Shtirlitz [24]3 years ago
5 0

Answer:

2.__ Dissolving two solids in water before mixing them together.

4.__ Grinding a solid into fine particles.

5.__ Adding an enzyme catalyst.

Explanation:

The rate of reaction is the measure of the speed of a chemical reaction.

Some factors affects the rate of reactions such as pressure, temperature, concentration, surface area, presence of catalyst.

  • Reactions in liquid medium are much faster than those between solids because there is a flow of substances. As they come in contact with one another, collision begins to take place.
  • Grinding a solid into fine particles increases the surface area. An increase in surface area increases the rate of reaction.
  • Adding an enzyme catalyst lowers the activation energy and reduces the energy barrier that must be overcome before a reaction takes place.
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How many grams of oxygen gas are required to produce 65.75 grams of steam?
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Answer:

The mass of oxygen gas required to produce 65.75 grams of steam is approximately 162.2 grams

Explanation:

From the question, we have the following chemical reaction equation;

2C₃H₁₈(l) + 25O₂ (g) → 16CO₂(g) + 18H₂O (g)

The molar mass of oxygen, O₂ = 32 g/mol

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25 moles of oxygen are required to produce 18 moles of steam

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(32 × 25) g of oxygen are required to produce (18 × 18.01528) g of steam

65.75 g of steam will be produced by (32 × 25)/(18 × 18.01528) × 65.75 g ≈ 162.2 g of oxygen O₂.

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3 years ago
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maria [59]
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Explanation:

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Answer:

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