Three liters of hydrogen gas are stored at a pressure of 300 kPa. If the temperature does not change, what will the volume of the gas be when the pressure is decreased to 50 kPa?

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.