Mole Conversions

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 do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in grams per mole). Formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of Lithium (Li)?

Back

The molar mass of Lithium (Li) is approximately 6.94 g/mol.

Front

How many atoms are in one mole of a substance?

Back

One mole of any substance contains approximately 6.022 x 10^23 entities (Avogadro's number).

Front

What is dimensional analysis?

Back

Dimensional analysis is a mathematical technique used to convert one unit of measurement to another using conversion factors.

Front

How do you find the number of atoms in a given mass of a substance?

Back

To find the number of atoms, first convert the mass to moles using the molar mass, then multiply the number of moles by Avogadro's number.

Front

What is the molar mass of Aluminum (Al)?

Back

The molar mass of Aluminum (Al) is approximately 26.982 g/mol.

Front

How many moles are in 19.82 grams of Magnesium (Mg)?

Back

To find the moles of Mg, divide 19.82 g by the molar mass of Mg (24.305 g/mol), which equals approximately 0.8156 moles.

Front

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

Back

Moles = Mass (g) / Molar Mass (g/mol).

Front

How many grams are in 2 moles of Carbon Dioxide (CO2)?

Back

To find the mass, multiply the number of moles (2) by the molar mass of CO2 (44.01 g/mol), which equals 88.02 grams.