Molar conversions Makeup

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

Front

How many atoms are in one mole of sulfur (S)?

Back

One mole of sulfur (S) contains 6.022 x 10^23 atoms.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of particles in one mole of a substance.

Front

How do you convert from particles to moles?

Back

To convert from particles to moles, divide the number of particles by Avogadro's number (6.022 x 10^23).

Front

How do you convert from moles to particles?

Back

To convert from moles to particles, multiply the number of moles by Avogadro's number (6.022 x 10^23).

Front

What is the relationship between moles and molecules?

Back

One mole of any substance contains the same number of molecules as one mole of any other substance, which is Avogadro's number (6.022 x 10^23).

Front

What is the significance of Avogadro's number in chemistry?

Back

Avogadro's number allows chemists to count particles by weighing them, as it relates the macroscopic scale (grams) to the microscopic scale (individual atoms or molecules).

Front

If you have 2 moles of a substance, how many particles do you have?

Back

You have 2 moles x 6.022 x 10^23 particles/mole = 1.2044 x 10^24 particles.

Front

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

Back

The formula is: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).