Calculating Reacting Masses And Gas Volumes Flashcards
(16 cards)
What does a balanced equation show in a chemical reaction?
The ratio, in moles, of reactants and products that take part in the reaction.
What is the stoichiometry of a reaction?
The ratio of reactants and products in a chemical reaction.
In the Haber process, how many moles of ammonia are formed from 1 mole of nitrogen and 3 moles of hydrogen?
2 moles of ammonia.
What is the limiting reactant in a reaction?
The reactant that is not in excess and limits the amount of product formed.
How do you calculate the amount of a limiting reactant?
Amount = mass / molar mass.
What is the balanced equation for the decomposition of magnesium nitrate?
2Mg(NO3)2(5) → 2MgO(s) + 4NO2(g) + O2(g).
Calculate the amount of gaseous product formed from 3.50 g of magnesium nitrate. What is the amount of O2 formed?
0.0118 mol.
What is the ratio of Mg(NO3)2 to O2 in the reaction?
2:1.
What is the balanced equation for the decomposition of lithium nitrate?
4LiNO3(5) → 2Li2O(s) + 4NO2(g) + O2(g).
Calculate the amount of lithium nitrate, LiNO3, in moles from 1.24 g.
0.018 mol.
Using the reaction of lithium nitrate, how many moles of lithium oxide, Li2O, are formed from 0.018 mol of LiNO3?
0.0090 mol.
How do you convert the amount of product formed into mass?
Mass = amount x molar mass.
What is the mass of Li2O formed from 0.0090 mol?
0.27 g.
What is the balanced equation for the decomposition of calcium nitrate?
2Ca(NO3)2(s) → 2CaO(s) + 4NO2(g) + O2(g).
How do you calculate the total mass of gases formed from 4.20 g of calcium nitrate?
Use the balanced equation and stoichiometry.
True or False: If you react 1 mole of nitrogen with 6 moles of hydrogen, you will form 4 moles of ammonia.
False.
