Hess’s law A -> B Delta H= +30kJ
B -> C Delta H= +60kJ
A.) Use Hess’s law to calculate the enthalpy change for the reaction A -> C
B.) Construct an enthalpy diagram for substances A, B, and C and show how Hess’s law applies.

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma

Aman applies a force of 500n to push a truck 100m down the street how much does he do?

Is it safe to take 450mg of diphenhydramine hydrochloride?