Can anyone me with this question? - describe three clues that would indicate that a chemical change has taken place.

Which statement accurately describes the rock layers? layer 8 is older than layer 1. layer 3 is younger than layer 6. layer 4 and layer 10 are the same relative age. layer 2 and layer 9 are the same relative age.

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

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false