Convert 400.0 nm to mm.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass 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.

See the attachment and solve question 5th