2. How many grams of sodium fluoride (NaF) are needed to prepare a 0.400m NaF
solution that contains 750 g water? (molar mass of NaF - 42.0 g/mol)
20%
A 18.9 g NaF
OB 9.12 g NaF
c 12.6 g Naf
OD 28.0 g Naf

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?