Answer:
1.048x10⁻³M/s is the rate of reaction
Explanation:
Based on the reaction:
2HBr → H₂ + Br₂
The rate of reaction is defined as:
1/2 Δ[HBr] / Δt
1/2 because the reaction is consuming 2 times HBr per mole of reaction
Where Δ[HBr] is 0.550M - 0.506M = 0.044M
And Δt is 21.0s. The average rate of reaction is:
1/2 0.044M / 21.0s =
1.048x10⁻³M/s is the rate of reaction
