Which energy transformation is taking place when an animal eats food so it can keep warm

What is the chemical formula of the following compound

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0