Am i ugly? right in the comments yes or no

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.

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

What are two examples of phase changes that skip a phase during transition?