Calcium hydroxide is used as a soil conditioner in home gardens. when mixed with water, it releases hydroxide ions. which of the following is the most likely ph for a solution of calcium hydroxide and water. a) 1 b.)3 c.) 7 d.) 10

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.