Avogadro's Hypothesis

Front

What is Avogadro's Hypothesis?

Back

Avogadro's Hypothesis states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number (6.022 x 10^23) is the number of atoms, molecules, or particles in one mole of a substance.

Front

Define a diatomic molecule.

Back

A diatomic molecule is a molecule that consists of two atoms, which may be of the same or different chemical elements.

Front

What is the formula for calculating the number of moles from a given mass?

Back

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

Front

How many molecules are in 1 mole of a gas?

Back

1 mole of a gas contains Avogadro's number of molecules, which is approximately 6.022 x 10^23.

Front

What is the relationship between volume and moles of a gas at STP?

Back

At Standard Temperature and Pressure (STP), 1 mole of an ideal gas occupies 22.4 liters.

Front

What does STP stand for in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atmosphere pressure.

Front

If 1 volume of gas A decomposes to form 1 volume of gas B and 2 volumes of gas C, what is the stoichiometric relationship?

Back

The stoichiometric relationship can be represented as A → B + 2C.

Front

What is the molar volume of a gas at STP?

Back

The molar volume of a gas at STP is 22.4 liters.

Front

How do you determine the number of atoms in a compound like N2O4?

Back

To determine the number of atoms, add the subscripts: N2O4 has 2 nitrogen atoms and 4 oxygen atoms, totaling 6 atoms.