When an apple is cut, it often turns brown. What does the color change indicate? A. physical change only
B. chemical change only
C. physical and chemical changes

What is the chemical formula of the following compound

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

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.