first order reaction
rate constant at 427k: 5.11x10-5
initial concentration is 0.0340M
I know half life: 0.693/5.11x10-5 = 1,3561sec --> 3.7hour
Is there a method for solving these above questions or is it just about estimation of what you know?
question 1: what is the molarity after 2.00hour?
I got about 0.0183 molar
question 2: how many minutes does it take for concentration to drop to 0.0300M?
I got about 1 minute
question 3: how many minutes does it take for 20% to react?
I got about 90.4 minutes