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 a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring that mass is conserved.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of moles of a 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 mole concept in chemistry?

Back

The mole is a unit that measures the amount of substance. One mole contains approximately 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

What is the significance of STP in gas calculations?

Back

STP (Standard Temperature and Pressure) is defined as 0 degrees Celsius and 1 atmosphere pressure, where 1 mole of an ideal gas occupies 22.4 liters.

Front

How do you calculate the number of moles from grams?

Back

To calculate moles from grams, use the formula: moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18.02 g/mol.

Front

What is the relationship between moles and volume for gases at STP?

Back

At STP, 1 mole of any gas occupies 22.4 liters.

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.