Someone help 6th grade science i will give brainliest

What is the mass of 0.46 mol of mgcl2

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.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o