Balancing Chemical Equations Gizmos Assessment Answers

What coefficients would balance the following equation?__Al + __O2 → __Al2O3 A. 2Al + 3O2 → 1Al2O3 B. 2Al + 3O2 → 2Al2O3 C. 3Al + 3O2 → 2Al2O3 D. 4Al + 3O2 → 2Al2O3

What coefficients would balance the following equation?__C2H6 + __O2 → __CO2 + __H2O A. 1C2H6 + 5O2 → 2CO2 + 3H2O B. 2C2H6 + 5O2 → 4CO2 + 6H2O C. 2C2H6 + 7O2 → 4CO2 + 6H2O D. 2C2H6 + 10O2 → 4CO2 + 6H2O

Classify the chemical reaction shown here:Mg + H2SO4 → MgSO4 + H2 A. Combination B. Single replacement C. Decomposition D. Double replacement

Classify the chemical reaction shown here:CaCO3 → CaO + CO2 A. Combination B. Single replacement C. Decomposition D. Double replacement

Which of the following is an example of a double replacement reaction? A. 3Fe + 2O2 → Fe3O4 B. BaCl2 + K2CO3 → BaCO3 + 2KCl C. NiCO3 → NiO + CO2 D. Cl2 + 2NaBr → 2NaCl + Br2