Chemical Reaction Rates Quiz

When [O_2] is decreasing at 0.23 mol/L·s, at what rate is [H_2O] increasing?

• 0.23 mol/L·s

• 0.46 mol/L·s

• 0.12 mol/L·s

• 0.69 mol/L·s

In the reaction 2H_2(g) + O_2(g) → 2H_2O(g), what is the relationship between the rate of decrease of [O_2] and the rate of increase of [H_2O]?

• The rate of [O_2] decrease is twice the rate of [H_2O] increase.

• The rate of [O_2] decrease is half the rate of [H_2O] increase.

• The rate of [O_2] decrease is equal to the rate of [H_2O] increase.

• The rate of [O_2] decrease is three times the rate of [H_2O] increase.

According to the rate expression, how does the rate of [H_2] change compare to the rate of [O_2] change?

• [H_2] changes at the same rate as [O_2].

• [H_2] changes at half the rate of [O_2].

• [H_2] changes at twice the rate of [O_2].

• [H_2] changes at three times the rate of [O_2].

If [NO] is decreasing at a rate of 1.60×10⁻⁴ mol/L·s, how fast is [O₂] decreasing?

• 3.20×10⁻⁴ mol/L·s

• 8.00×10⁻⁵ mol/L·s

• 1.60×10⁻⁴ mol/L·s

• 3.20×10⁻⁵ mol/L·s

When [H₂O] is increasing at a rate of 2.52×10⁻² mol/L·s, how fast is [O₂] decreasing?

• 6.30×10⁻³ mol/L·s

• 5.04×10⁻³ mol/L·s

• 1.26×10⁻² mol/L·s

• 2.52×10⁻² mol/L·s

What is the reaction order with respect to NO in the reaction 2NO(g) + O2(g) ⟶ 2NO2(g)?

• First order

• Second order

• Third order

• Zero order

In the reaction CH3CHO(g) ⟶ CH4(g) + CO(g), what is the overall reaction order?

• First order

• Second order

• Third order

• Zero order

For the reaction H2O2(aq) + 3I⁻(aq) + 2H⁺(aq) ⟶ I3⁻(aq) + 2H2O(l), what is the reaction order with respect to I⁻?

• First order

• Second order

• Third order

• Zero order

By what factor does the rate increase if [NO] is tripled and [O2] is doubled in the reaction 2NO(g) + O2(g) ⟶ 2NO2(g)?

• 6

• 12

• 18

• 24

What is the reaction order with respect to H⁺ in the reaction H2O2(aq) + 3I⁻(aq) + 2H⁺(aq) ⟶ I3⁻(aq) + 2H2O(l)?

• First order

• Second order

• Third order

• Zero order