Consider the following reaction 2A(g) + 1B(g) → 3C(g) + 7D(g) If A is decreases at the rate of 3.1 M/s, at what rate is D changing? (Keep your answer to one decimal place)

If a given reaction is got a rate constant value of 5.2 x10-3 M4 s-1 what would be the order of that reaction? (please give the answer as just an integer, no decimal places needed)

The reaction 2NOBr (g) → 2 NO (g) + Br2 (g) gives a straight line for the data of (concentration of NOBr) vs time with a half-life of 21.6 seconds. What % of the initial concentration of NOBr is left after 2.3 seconds. (Please keep your answer to 3 sig figs)