Balancing Chemical Equations Practice

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

How do you determine the molar mass of a compound?

Back

To determine the molar mass, sum the atomic masses of all atoms in the compound's formula, using the periodic table.

Front

What is molarity (M)?

Back

Molarity is a measure of concentration, defined as the number of moles of solute per liter of solution (mol/L).

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the formula to find the volume of a solution given moles and molarity?

Back

Volume (L) = moles of solute / molarity (M).

Front

What are coefficients in a chemical equation?

Back

Coefficients are numbers placed before compounds in a chemical equation to indicate the number of moles of each substance involved in the reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Front

What is the significance of the coefficients in the equation Mg + 2NaF -> MgF2 + 2Na?

Back

The coefficients indicate that 1 mole of magnesium reacts with 2 moles of sodium fluoride to produce 1 mole of magnesium fluoride and 2 moles of sodium.

Front

What is the relationship between moles and liters in a solution?

Back

At standard temperature and pressure (STP), 1 mole of any gas occupies 22.4 liters; for solutions, the relationship is defined by molarity.