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 conservation of mass.

Front

What is the mole concept?

Back

The mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, ions, etc.). It allows chemists to count quantities of substances.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol). Formula: Moles = Mass (g) / Molar Mass (g/mol).

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, reflecting the law of conservation of mass.

Front

What is the significance of coefficients in a balanced equation?

Back

Coefficients indicate the number of moles of each substance involved in the reaction, allowing for stoichiometric calculations.

Front

How do you determine the limiting reactant?

Back

The limiting reactant is the substance that is completely consumed first in a chemical reaction, limiting the amount of product formed. It can be determined by comparing the mole ratios of reactants.

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water is approximately 18.02 g/mol, calculated from the atomic masses of hydrogen (1.01 g/mol) and oxygen (16.00 g/mol).

Front

How do you calculate the mass of a product formed in a reaction?

Back

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

Front

What is the ideal gas law?

Back

The ideal gas law is an equation of state for an ideal gas, expressed as PV = nRT, where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature.

Front

What is the volume of one mole of gas at STP?

Back

At standard temperature and pressure (STP), one mole of an ideal gas occupies 22.4 liters.