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WorksheetsBalancing chemical equations
Total questions: 5
Worksheet time: 55mins
Which of the following statements about balancing reactions is FALSE?
If there is no coefficient or subscript, a one is implied.
When coefficients are added the type of compound is changed in the chemical reaction.
Subscripts are multiplied by the coefficients to determine the number of atoms in a compound.
Coefficients are added to compounds to ensure both sides of the reaction have equal numbers of each atom.
When the equation, ___N2 + ___H2 → ___NH3 is balanced, the coefficient of hydrogen is
1
2
3
4
When the equation, ___O2 + ___C5H12 → ___ CO2 + ___H2O is balanced, the coefficient of O2 is:
3
4
5
8
What are the coefficients for the following reaction when it is properly balanced?
___HCl + ___Mg → ___MgCl2 + ___H2
2, 1, 1, 1
2, 1, 2, 2
1, 2, 1/2, 1
1, 1, 1, 2
Which of the following equations is NOT balanced properly?
2Cr + 6HCl → 2CrCl3 + 3H2
2NaHCO3 → Na2CO3 + CO2 + H2O
Cr2(SO4)3 + 6KOH → 2Cr(OH)3 + 3 K2SO4
4NH3 + 14O2 → 4NO2 + 6H2O
