Mole Conversions Practice

Front

What is the molar mass of (NH4)2CO3?

Back

96.1 g/mol

Front

How do you calculate the number of moles from grams?

Back

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

Front

What is the molar mass of cobalt (Co)?

Back

58.93 g/mol

Front

How many moles are in 48.86 g of cobalt?

Back

0.8291 moles

Front

How do you convert molecules to grams?

Back

Grams = (number of molecules / Avogadro's number) x molar mass

Front

What is Avogadro's number?

Back

6.022 x 10^23 molecules/mol

Front

How many grams are in 1.2 x 10^24 molecules of CO?

Back

56 grams

Front

What is the formula to find the number of formula units in a sample?

Back

Formula units = (mass (g) / molar mass (g/mol)) x Avogadro's number

Front

What is the molar mass of calcium chloride (CaCl2)?

Back

110.98 g/mol

Front

How many formula units are in a 25.69 g sample of calcium chloride?

Back

1.394 x 10^23 units