Stoichiometric Calculations Using Chemical Equations
Chemistry ⇒ Stoichiometry and Chemical Calculations
Stoichiometric Calculations Using Chemical Equations starts at 10 and continues till grade 12.
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A mixture contains 5.0 g of H2 and 32.0 g of O2. How many grams of H2O can be formed? (2H2 + O2 → 2H2O; Molar mass H2 = 2.0 g/mol, O2 = 32.0 g/mol, H2O = 18.0 g/mol)
A reaction has a percent yield of 80%. If the theoretical yield is 50 g, what is the actual yield?
A reaction mixture contains 0.25 mol of A and 0.40 mol of B. The balanced equation is A + 2B → C. What is the maximum number of moles of C that can be formed?
A reaction produces 15.0 g of product, but the theoretical yield is 20.0 g. What is the percent yield?
A sample of 5.0 g of Mg reacts with excess HCl. How many liters of H2 gas at STP are produced? (Mg + 2HCl → MgCl2 + H2; Molar mass Mg = 24.3 g/mol)
A student reacts 10.0 g of Ca with 20.0 g of Cl2 to form CaCl2 according to the equation: Ca + Cl2 → CaCl2. Which is the limiting reactant? (Molar masses: Ca = 40.1 g/mol, Cl2 = 70.9 g/mol)
Calculate the number of moles of AgNO3 required to completely react with 0.5 moles of NaCl in the reaction: AgNO3 + NaCl → AgCl + NaNO3.
Describe the steps involved in determining the limiting reactant in a chemical reaction.
How many grams of CO2 are produced from 10.0 g of C6H12O6 in the reaction: C6H12O6 → 2C2H5OH + 2CO2? (Molar mass C6H12O6 = 180.0 g/mol, CO2 = 44.0 g/mol)
How many grams of NaCl are produced when 2.0 moles of Na react with excess Cl2? (2Na + Cl2 → 2NaCl; Molar mass NaCl = 58.5 g/mol)
How many liters of CO2 at STP are produced from 10.0 g of CaCO3? (CaCO3 → CaO + CO2; Molar mass CaCO3 = 100.1 g/mol; 1 mol gas at STP = 22.4 L)
How many moles of CO2 are produced when 5 moles of C2H6 combust completely? (C2H6 + 3.5O2 → 2CO2 + 3H2O)
How many moles of H2O are produced when 3 moles of O2 react with excess H2? (2H2 + O2 → 2H2O)
How many moles of O2 are needed to completely combust 4 moles of C2H6? (2C2H6 + 7O2 → 4CO2 + 6H2O)
If 2.0 moles of H2 react with excess O2, how many grams of H2O are formed? (2H2 + O2 → 2H2O; Molar mass H2O = 18.0 g/mol)
If 3.0 moles of Fe react with 2.0 moles of O2 to form Fe2O3 (4Fe + 3O2 → 2Fe2O3), what is the limiting reactant?
If 4 moles of NH3 are produced from the reaction N2 + 3H2 → 2NH3, how many moles of H2 are required?
In the reaction 2C + O2 → 2CO, if 24 g of C reacts with 64 g of O2, what is the limiting reactant? (Molar mass C = 12.0 g/mol, O2 = 32.0 g/mol)
In the reaction 2KClO3 → 2KCl + 3O2, how many grams of O2 are produced from 12.25 g of KClO3? (Molar mass: KClO3 = 122.5 g/mol, O2 = 32.0 g/mol)
In the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of NaOH are produced from 4.6 g of Na? (Molar mass Na = 23.0 g/mol, NaOH = 40.0 g/mol)
