Basic Mole Conversions (Reg) Review

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which represents the number of representative particles (atoms, molecules, etc.) in one mole of a substance.

Front

How many molecules are in one mole of a substance?

Back

There are 6.02 x 10^23 molecules in one mole of a substance.

Front

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

Back

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

Front

What is the molar mass of Potassium Chloride (KCl)?

Back

The molar mass of KCl is approximately 74.55 g/mol.

Front

How do you calculate percent by mass?

Back

Percent by mass = (mass of component / total mass) x 100%.

Front

What is the percent by mass of Copper (Cu) in CuBr2?

Back

The percent by mass of Cu in CuBr2 is 28.4%.

Front

What is the relationship between moles and grams?

Back

Moles can be converted to grams using the formula: grams = moles x molar mass.

Front

How many moles are in 450g of KCl?

Back

There are 6.0 moles in 450g of KCl.

Front

What is the total number of atoms in C3H5(NO3)3?

Back

C = 3, H = 5, N = 3, O = 9.

Front

What does one mole of a substance represent?

Back

One mole of a substance represents 6.02 x 10^23 representative particles.