Question

The rate law for a hypothetical reaction is rate = k [A]2. When the concentration is 0.10 moles/liter, the rate is 2.7 × 10-5 M*s-1. What is the value of k?

2.7 × 10-3

2.7 × 10-3 M-1s-1

7.2 × 105 M-1s-1

2.7 × 10-4 M-1s-1

Answer 1

Substituting the values into the equation:

2.7 x 10⁻⁵ = k(0.1)²
k = 2.7 x 10⁻³ M⁻¹s⁻¹