Chemistry MP3CP1 Review

Front

What is the empirical formula?

Back

The empirical formula is a formula that shows the lowest whole number ratio of elements in a compound.

Front

How many molecules are in 1 mole of a substance?

Back

1 mole of a substance contains approximately 6.022 x 10^23 molecules, known as Avogadro's number.

Front

What is the mass of one mole of carbon (C)?

Back

The mass of one mole of carbon is 12 g.

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is 18 g/mol.

Front

What is a molecular formula?

Back

A molecular formula shows the actual number and kinds of atoms present in one molecule of a compound.

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the formula.

Front

What is the difference between empirical and molecular formulas?

Back

The empirical formula shows the simplest ratio of elements, while the molecular formula shows the actual number of atoms.

Front

What is the molar mass of sodium chloride (NaCl)?

Back

The molar mass of sodium chloride is approximately 58.5 g/mol.

Front

How many grams are in 2 moles of aluminum (Al)?

Back

2 moles of aluminum weigh 54 g (27 g/mol x 2).

Front

What is the formula to convert moles to grams?

Back

Grams = Moles x Molar Mass.