What is the weight of 22.4 litres of Ammonia gas at STP?
17 g
34 g
10 g
20 g
At Standard Temperature and Pressure 22.4 liters of compound = 1 moles = Molecular weight of Ammonia = 14+3 = 17 g
Given that the relative molecular mass of copper oxide is 80, what volume of ammonia (measured at STP) is required to completely reduce 120 g of copper oxide? The equation for the reaction is:
3CuO + 2NH3 → 3Cu + 3H2O
Volume occupied by 1 mole of gas at STP is 22.4 litres).