Atomic Mass and Moles Review

Front

What is atomic mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is a mole?

Back

A unit in chemistry that represents 6.02 x 10^23 particles (atoms, molecules, etc.).

Front

How do you calculate the number of moles from atoms?

Back

Number of moles = Number of atoms / Avogadro's number (6.02 x 10^23).

Front

What is the molar mass of an element?

Back

The mass of one mole of a substance, usually expressed in grams per mole (g/mol).

Front

How do you convert moles to grams?

Back

Grams = Moles x Molar mass.

Front

What is the average atomic mass of boron?

Back

10.811 amu.

Front

How many grams are in 3.01 x 10^22 atoms of magnesium?

Back

1.22 grams.

Front

How many moles are in 1.24 x 10^23 atoms of carbon?

Back

0.206 moles.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons, resulting in different atomic masses.

Front

How many isotopes are shown in the mass spectrum?

Back

2.