1. When shot from the barrel of a pellet gun (50.00 cm long), a 5.000 gram pellet moves from rest to 400.0 m/s. What force does the gun exert on the pellet?

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.