Quantifying Reaction Quiz

What is the mole ratio of the reaction 2H2 + O2 -> 2H2O?

• 2:2:1

• 1:2:2

• 3:1:2

• 2:1:2

Calculate the mole ratio of the reactant 4Al + 3O2 -> 2Al2O3.

• 4:3

• 1:2

• 2:3

State the conservation law that applies to chemical reactions.

• Law of conservation of charge

• Law of conservation of energy

• Law of conservation of momentum

• Law of conservation of mass

Explain the conservation of mass in a chemical reaction.

• The mass of the reactants decreases in a chemical reaction.

• The total mass of the reactants is equal to the total mass of the products.

• The conservation of mass only applies to solid reactants and products.

• The mass of the products is always greater than the mass of the reactants.

What is the molar mass of H2O?

• 22.99 g/mol

• 20.00 g/mol

• 18.02 g/mol

• 16.04 g/mol

Calculate the molar mass of CO2.

• 58.12 g/mol

• 44.01 g/mol

• 35.5 g/mol

• 22.01 g/mol

What is the mass of 3 moles of NaCl?

• 200.50 g

• 175.32 g

• 50.75 g

• 100.25 g

Determine the mass of 4 moles of H2SO4.

• 392.32 g

• 32.00 g

• 200.50 g

• 500.25 g

Mg + O2 --> MgO

explain why this equation considered as an unbalanced equation

CH4 + 2O2 ---> CO2 + 2H2O

Interpret the equation in terms of numbers of Atoms, molecules, moles, and volumes of gasses at STP