Stoichiometry

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 equations.

Front

What is a Balanced Equation?

Back

A balanced equation is a chemical equation in which the number of atoms for each element is the same on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the Molar Mass of NaCl?

Back

The molar mass of NaCl (sodium chloride) is approximately 58.44 g/mol.

Front

How many moles are in 452 grams of NaCl?

Back

Moles = 452 g / 58.44 g/mol = 7.73 moles.

Front

What is the mole ratio in the reaction 4 Al + 3 O2 -> 2 Al2O3?

Back

The mole ratio is 4 moles of Al to 3 moles of O2 to 2 moles of Al2O3.

Front

How do you find the mass of a product in a reaction?

Back

To find the mass of a product, first determine the moles of the reactant, use the mole ratio from the balanced equation, and then convert moles of the product to grams using its molar mass.

Front

What is the first step in solving a stoichiometry problem?

Back

The first step is to write a balanced equation for the chemical reaction.

Front

How many grams of O2 are produced from 12 moles of NaClO3?

Back

576 g of O2 are produced from 12 moles of NaClO3.

Front

What is the mass of O2 needed to burn 36.1 g of B2H6?

Back

124 g of O2 is needed to burn 36.1 g of B2H6.