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WorksheetsChemical Equations - 7.2
Total questions: 9
Worksheet time: 18mins
In a balanced chemical equation, the mass of the reactants is equal to the
atoms in a molecule.
atomic mass of the elements.
volume of the reactants.
mass of the products.
What coefficient is missing in C2H4 + (?)O2 --> 2CO2 + 2H2O?
2
3
4
5
Which of the following represents the word equation magnesium + oxygen --> magnesium oxide?
CH4+ O2 --> CH4O2
MgO + O --> MgO2
2Mg + O2 --> 2MgO
2CH4 + O2 --> 2CH3OH
In the reaction 3CuCl2 + 2Al --> 2AlCl3 + 3Cu, how many moles of Al react with 3 moles of CuCl2?
1 mol
2 mol
3 mol
4 mol
In the electrolysis of water, 2H2O --> 2H2 + O2, if the volume of oxygen produced was 8 mL, what would be the volume of hydrogen produced?
4 mL
8 mL
16 mL
24 mL
If you use 3 mol of O2 in the reaction 2Mg + O2 --> 2MgO, how many moles of Mg are needed?
1 mol
2 mol
4 mol
6 mol
Give the mole ratio for the following equation: Zn + 2HCl --> ZnCl2 + H2.
1:1:1
1:2:1
1:2:1:1
1:2:2:2
Which of the following equations is not balanced?
Fe + S --> FeS
KOH + HCl --> KCl + H2O
2Mg + O2 --> 2MgO
NaCl + H2SO4 --> Na2SO4 + HCl
Give the mole ratio for the following equation:
2H2O --> 2H2 + O2
1:1:1
2:2:1
2:2:2
2:1
