What does Hess's law state?

A. The enthalpy of a reaction can be determined only from single-
step reactions.

B. The enthalpy of a reaction is the sum of the enthalpies of
intermediate reactions.

C. The enthalpy of a reaction is positive if it is endothermic and
negative if exothermic.

D. The enthalpy of a reaction can be measured from heat produced in
a calorimeter.

Will give ! what are the advantages and disadvantages of nuclear power? check all that apply. one advantage of nuclear energy is that it does not produce carbon dioxide emissions. storage of nuclear waste is a short-term problem associated with nuclear energy. the problem with uranium mining is that a large quantity of uranium must be extracted to meet energy needs because the energy release from uranium fission is so low. safe operation of a nuclear power plant can be jeopardized by a human mistake.

Which formula can be used to calculate the molar mass of hydrogen peroxide

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.