Unit #5 Exam Review

Which of the following represents the overall chemical equation for the reaction and the rate law for elementary step 2 ?

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NGSS.HS-PS1-5

Which of the following represents a rate law for the overall reaction that is consistent with the proposed mechanism?

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NGSS.HS-PS1-5

Based on the information, which of the following is the rate law expression for the reaction?

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NGSS.HS-PS1-5

Based on the information, which of the following is the initial rate law for the reaction?

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NGSS.HS-PS1-5

Based on the proposed mechanism, which of the following best describes the concentration of the species represented above as the reaction occurs?

• The concentration is larger than that of reactant or product.

• The concentration is very low for the duration of the reaction.

• The concentration fluctuates between high and low during the reaction.

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NGSS.HS-PS1-5

An experiment was conducted to determine the rate law for the reaction A2 (g)+B(g)→A2B (g). The table above shows the data collected. Based on the data in the table, which statement is correct?

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NGSS.HS-PS1-5

If the reaction occurs in a single elementary step that is a three-body molecular collision, then which of the following is the equation for the elementary step?

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Hydrogen peroxide decomposes to produce water and oxygen according to the equation above. An experimentally determined graph for the first-order decomposition of hydrogen peroxide is provided below.

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NGSS.HS-PS1-5

A proposed mechanism for the chemical reaction

2NO2(g) + F2 (g) → 2NO2F(g)

Which of the following rate laws is consistent with this mechanism?

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Tags

NGSS.HS-PS1-5

A 0.35 g sample of Li(s) is placed in an Erlenmeyer flask containing 100 mL of water at 25°C. A balloon is placed over the mouth of the flask to collect the hydrogen gas that is generated. Which of the following changes will most likely increase the rate of reaction between Li(s) and water?

• Using 125 mL of water instead of 100 mL

• Using a 0.25 g sample of Li(s) instead of a 0.35 g sample

• Using a 0.35 g sample of Li(s) cut into small pieces

• Decreasing the water temperature before adding the Li(s)

Tags

NGSS.HS-PS1-5