Chemistry help please?

2017-07-25 11:16 pm

14. The rate for a reaction between reactants X, Y, and Z is directly proportional to [X], [Y], and the square of [Z]. What is the rate law for this reaction?

R = k[X][Y][Z]2
R = k[X][Y][2Z]
R = k[X][Y][2Z]2

15. The rate of a reaction does not depend on the concentration of the reactant A when the order of reactant A is __________.

zero
one
two
three
16. Which statement is true for the equilibrium constant expression for C3H8(g) + 5O2(g) ⇌ 3CO2(g) + 4H2O(g)?

The molarity of O2 would be in the numerator and raised to the fifth power.
The molarity of O2 would be in the denominator and raised to the fifth power.
The molarity of the CO2 would be in the denominator and raised to the third power.
The molarity of the H2O would be in the denominator and raised to the fourth power.

回答 (1)

戇戇居士

2017-07-25 11:27 pm

✔ 最佳答案

14.
The rate for a reaction between reactants X, Y, and Z is directly proportional to [X], [Y], and the square of [Z]. What is the rate law for this reaction?

The answer: R = k [X] [Y] [Z]²

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15.
The rate of a reaction does not depend on the concentration of the reactant A when the order of reactant A is __________.

The answer: zero

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16.
Which statement is true for the equilibrium constant expression for C₃H₈(g) + 5O₂(g) ⇌ 3CO₂(g) + 4H₂O(g)?

Equilibrium constant, Keq = [CO₂]³ [H₂O]⁴ / ([C₃H₈] [O₂]⁵)
[CO₂]³ and [H₂O]⁴ are in the numerator.
[O₂]⁵ is in the denominator.

The answer: The molarity of O2 would be in the denominator and raised to the fifth power.

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