Unit 6 Flashcard 1 - Moles

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

How many particles are in one mole?

Back

6.02 x 10^23 particles, known as Avogadro's number.

Front

What is the formula to calculate the number of moles?

Back

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

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all the atoms in the compound's formula.

Front

What is the molar mass of NaF?

Back

The molar mass of NaF (Sodium Fluoride) is approximately 41.99 g/mol.

Front

How many moles are in 2.1 g of NaF?

Back

0.050 mol.

Front

What is the molar mass of FeCl3?

Back

The molar mass of FeCl3 (Iron(III) Chloride) is approximately 162.19 g/mol.

Front

How many moles are in 124.1 g of FeCl3?

Back

0.7652 mol.

Front

What is the molar mass of Ba3(PO4)2?

Back

The molar mass of Ba3(PO4)2 (Barium Phosphate) is 601.93 g/mol.

Front

How many molecules are in 1 mole of a substance?

Back

1 mole of a substance contains 6.02 x 10^23 molecules.