Balancing Chemical Equations
Chemistry ⇒ Chemical Reactions and Equations
Balancing Chemical Equations starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Balancing Chemical Equations.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
Describe the importance of balancing chemical equations in chemical reactions.
Explain why balancing chemical equations is important for stoichiometric calculations.
Explain why it is incorrect to balance a chemical equation by changing the subscripts in chemical formulas.
What is the first step you should take when balancing a chemical equation?
Which of the following equations is balanced? (1) 2H2 + O2 → 2H2O (2) H2 + O2 → H2O (3) 2H2 + 2O2 → 2H2O (4) H2 + 2O2 → 2H2O
Which of the following is a balanced equation for the reaction of hydrogen and nitrogen to form ammonia? (1) N2 + 3H2 → 2NH3 (2) N2 + H2 → NH3 (3) 2N2 + 3H2 → 2NH3 (4) N2 + 2H2 → 2NH3
Which of the following is NOT a correct step in balancing a chemical equation? (1) Changing the subscripts of compounds (2) Adjusting coefficients (3) Counting atoms of each element (4) Ensuring the same number of atoms on both sides
Which of the following is the correct balanced equation for the combustion of methane? (1) CH4 + O2 → CO2 + 2H2O (2) CH4 + 2O2 → CO2 + 2H2O (3) 2CH4 + 3O2 → 2CO2 + 4H2O (4) CH4 + O2 → CO + 2H2O
Balance the following equation: ___AgNO3 + ___Cu → ___Cu(NO3)2 + ___Ag
Balance the following equation: ___Al + ___HCl → ___AlCl3 + ___H2
Balance the following equation: ___Al + ___O2 → ___Al2O3
Balance the following equation: ___BaCl2 + ___Na2SO4 → ___BaSO4 + ___NaCl
Balance the following equation: ___C2H5OH + ___O2 → ___CO2 + ___H2O
Balance the following equation: ___C2H6 + ___O2 → ___CO2 + ___H2O
Balance the following equation: ___C3H8 + ___O2 → ___CO2 + ___H2O
Balance the following equation: ___C4H10 + ___O2 → ___CO2 + ___H2O
True or False: Balancing chemical equations is necessary to calculate the correct amount of reactants and products in a reaction.
True or False: In a balanced equation, the total mass of reactants is always less than the total mass of products.
True or False: The coefficients in a balanced equation represent the relative number of moles of each substance involved in the reaction.
True or False: The law of conservation of mass is always obeyed when balancing chemical equations.
