Converting Grams to Moles and Vice Versa

What is the first step in solving a problem involving the conversion between grams and moles?

• Measure the temperature

• Calculate the density

• Find the molar mass of the substance

• Determine the volume of the substance

What is the molar mass of aluminum?

• 22.99 g/mol

• 26.98 g/mol

• 12.01 g/mol

• 58.44 g/mol

How do you calculate the mass of 4.30 moles of aluminum?

• Subtract the molar mass from the number of moles

• Divide the number of moles by the molar mass

• Multiply the number of moles by the molar mass

• Add the number of moles to the molar mass

What is the result of multiplying 4.30 moles of aluminum by its molar mass?

• 22.99 g

• 12.01 g

• 116 g

• 58.44 g

What is a conversion factor?

• A method to measure temperature

• A formula for finding volume

• A tool to calculate density

• A ratio used to convert units

Which conversion factor should be used to convert moles of aluminum to grams?

• 58.44 g of aluminum / 1 mole of aluminum

• 1 mole of aluminum / 58.44 g of aluminum

• 1 mole of aluminum / 26.98 g of aluminum

• 26.98 g of aluminum / 1 mole of aluminum

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

• 58.44 g/mol

• 26.98 g/mol

• 35.45 g/mol

• 22.99 g/mol

How do you find the number of moles in 127.5 grams of sodium chloride?

• Multiply the grams by the molar mass

• Divide the grams by the molar mass

• Add the grams to the molar mass

• Subtract the molar mass from the grams

What is the number of moles in 127.5 grams of sodium chloride?

• 2.82 moles

• 1.23 moles

• 4.30 moles

• 5.84 moles

What is the general rule for converting grams to moles?

• Subtract grams from the molar mass

• Add grams to the molar mass

• Divide grams by the molar mass

• Multiply grams by the molar mass