The atmosphere is composed of
a. the oceans
b. the air within 500 feet of the earth's surface
c. all the gases that surround the earth
d. all the plants and animals that breathe the gases that surround the earth.

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

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.