PLS ANSWER FAST Which statement about chemical reaction rates is true?

The reaction rates cannot change.

The reaction rates can increase.

The reaction rates are always constant.

The reaction rates cannot decrease

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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.

How can one make a supersaturated solution? (apex)