How many formula units are in 136 g of potassium nitrate (KNO3)?

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

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

How many moles of potassium are needed to react completely with 12.8 moles of magnessium bromide?