Bena thinks that dissolving more salt in water causes the mixture’s freezing temperature to change. which is the best type of scientific investigation for bena to use to study this?

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.