An object with a charge of +0.004 C and a mass of 0.03 kg is in an electric field directed to the right with a magnitude of 600 N/C. What is the magnitude and direction of the acceleration of the object

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.