Stoichiometry Review

Front

What is stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the balanced chemical equations.

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, ensuring the law of conservation of mass is followed.

Front

How do you determine mole ratios from a balanced equation?

Back

Mole ratios are determined by the coefficients in front of the reactants and products in a balanced chemical equation.

Front

What is the significance of STP in stoichiometry?

Back

STP stands for Standard Temperature and Pressure, which is 0 degrees Celsius and 1 atmosphere pressure. It is used as a reference point for gas calculations.

Front

How many moles of H2 are needed to produce 2 moles of H2O?

Back

According to the equation 2H2 + O2 → 2H2O, 2 moles of H2 are needed to produce 2 moles of H2O.

Front

What is the molar mass of O2?

Back

The molar mass of O2 (oxygen gas) is approximately 32 g/mol.

Front

If 2 moles of NaClO3 decompose, how many moles of O2 are produced?

Back

According to the equation 2NaClO3 → 2NaCl + 3O2, 3 moles of O2 are produced from 2 moles of NaClO3.

Front

What is the formula to calculate the number of grams from moles?

Back

The formula is: grams = moles × molar mass.

Front

How many grams of H2 are produced from 2 moles of Al reacting with HCl?

Back

According to the equation 2Al + 6HCl → 2AlCl3 + 3H2, 3 moles of H2 are produced from 2 moles of Al.

Front

What is the molar mass of aluminum (Al)?

Back

The molar mass of aluminum (Al) is approximately 27 g/mol.