Converting Grams to Moles of Ions in Compounds

What is the given mass of sodium sulfate in the problem?

• 5.36 grams

• 6.5 grams

• 5.63 grams

• 5.6 grams

What is the molar mass of sodium sulfate used in the calculation?

• 140.04 g/mol

• 144.04 g/mol

• 146.04 g/mol

• 142.04 g/mol

What is the first step in setting up the calculation?

• Using Avogadro's number

• Writing down the given mass over 1

• Finding the molar mass

• Calculating the number of moles

What is the molar mass of sodium sulfate written as in the calculation?

• 1 mole of Na2SO4

• 142.04 grams of Na2SO4

• 1 mole of Na

• 2 moles of Na

How many moles of sodium ions are present in one mole of sodium sulfate?

• 4 moles

• 1 mole

• 2 moles

• 3 moles

What is the purpose of matching up the units in the calculation?

• To simplify the calculation

• To ensure consistency

• All of the above

• To avoid errors

Why is Avogadro's number not used in this calculation?

• Because it is too complex

• Because it is not given in the problem

• Because it is not relevant to the calculation

• Because the problem does not ask for the number of ions

What is the final calculated number of moles of sodium ions?

• 0.0739 moles

• 0.0937 moles

• 0.0793 moles

• 0.0973 moles

How many significant figures are used in the final answer?

• 3

• 4

• 2

• 5

What is the final step in the calculation?

• Writing the word 'ions'

• Using Avogadro's number

• Finding the molar mass

• Matching up the units