Which two particles each have a mass approximately equal to one atomic mass unit

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h