The Mole Flashcards

All 5 cards in this deck

How is one mole of a substance defined in terms of number of particles?

The Avogadro constant number of particles, $6.02 \times 10^{23}$ atoms, molecules, formulae or ions.

What is the mass of one mole of a substance?

Its relative particle mass in grams.

e.g. 1 mol of H atoms has a mass of 1.00 g

True or false? One mole of oxygen gas, $\mathrm{O_2}$, contains $6.02 \times 10^{23}$ oxygen atoms.

False. It contains $6.02 \times 10^{23}$ molecules, which is $1.204 \times 10^{24}$ atoms.

What is the formula linking moles, mass and relative formula mass?

moles = mass (g) ÷ relative formula mass

What is the equation linking the number of particles and the number of moles?

number of particles = moles × Avogadro constant ($6.02 \times 10^{23}$)