How are volcanologist and meteorologist similar and different?

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

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Which factor is likely to impact the possible number of compounds ?