How many moles of water are found in 9.61x10^14 molecules of water

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments