PLEASE HELP what is the relationship between a river's discharge rate and the amount of erosion that will occur?

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

Give more examples of this type of heat transfer:

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]