Question

d Ag + HNO3 ? AgNO3 + H2O + NO e Fe2O3 + CO ? Fe + CO2 13 Calculate the number of moles in each of the following: [4] a How many moles of H2 gas are produced when 0.1 mol of Mg reacts with excess HCl according to the following equation: Mg(s) + 2HCl(aq) ? MgCl2(aq) + H2(g) b How many moles of NaCl are produced when 0.5 moles of Na2CO3 react with excess hydrochloric acid? Na2CO3(s) + 2HCl(aq) ? 2NaCl(aq) + H2O(l) + CO2(g) c How many moles of hydrogen gas are produced when 0.4 moles of sodium react with excess water? 2Na + 2H2O ? 2NaOH + H2 d How many moles of oxygen are formed when 6 moles of KClO3 react? 2KClO3(s) ? 2KCl(s) + 3O2(g) 14 Calculate the numbers of moles present in each of the following at STP: [4] a 2.0 dm3 of O2(g) c 1.2 dm3 of N2(g) b 200 cm3 of NH3(g) d 750 cm3 of CO2(g)

          d Ag + HNO3 ? AgNO3 + H2O + NO
e Fe2O3 + CO ? Fe + CO2
13 Calculate the number of moles in each of the following: [4]
a How many moles of H2 gas are produced when 0.1 mol of Mg reacts with excess HCl according to the following equation:
Mg(s) + 2HCl(aq) ? MgCl2(aq) + H2(g)
b How many moles of NaCl are produced when 0.5 moles of Na2CO3 react with excess hydrochloric acid?
Na2CO3(s) + 2HCl(aq) ? 2NaCl(aq) + H2O(l) + CO2(g)
c How many moles of hydrogen gas are produced when 0.4 moles of sodium react with excess water?
2Na + 2H2O ? 2NaOH + H2
d How many moles of oxygen are formed when 6 moles of KClO3 react?
2KClO3(s) ? 2KCl(s) + 3O2(g)
14 Calculate the numbers of moles present in each of the following at STP: [4]
a 2.0 dm3 of O2(g) c 1.2 dm3 of N2(g)
b 200 cm3 of NH3(g) d 750 cm3 of CO2(g)

d Ag + HNO3 ? AgNO3 + H2O + NO
e Fe2O3 + CO ? Fe + CO2
13 Calculate the number of moles in each of the following: [4]
a How many moles of H2 gas are produced when 0.1 mol of Mg reacts with excess HCl according to the following equation:
Mg(s) + 2HCl(aq) ? MgCl2(aq) + H2(g)
b How many moles of NaCl are produced when 0.5 moles of Na2CO3 react with excess hydrochloric acid?
Na2CO3(s) + 2HCl(aq) ? 2NaCl(aq) + H2O(l) + CO2(g)
c How many moles of hydrogen gas are produced when 0.4 moles of sodium react with excess water?
2Na + 2H2O ? 2NaOH + H2
d How many moles of oxygen are formed when 6 moles of KClO3 react?
2KClO3(s) ? 2KCl(s) + 3O2(g)
14 Calculate the numbers of moles present in each of the following at STP: [4]
a 2.0 dm3 of O2(g) c 1.2 dm3 of N2(g)
b 200 cm3 of NH3(g) d 750 cm3 of CO2(g)

Added by Ann O.

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