Molar Mass and Conversion Concepts

This video tutorial explains how to convert moles of sodium carbonate (Na2CO3) to grams. It begins with an introduction to the concept of conversion, followed by a detailed explanation of how to calculate the molar mass by adding the mass of each atom in the compound. The video then demonstrates the conversion process by multiplying the number of moles by the molar mass, ensuring that units cancel out correctly to leave grams. Finally, it recaps the process and explains how to reverse the conversion from grams to moles by dividing by the molar mass.

What is the initial number of moles of sodium carbonate used in the video?

• 0.32 moles

• 0.35 moles

• 0.23 moles

• 0.25 moles

What is the molar mass of sodium carbonate (Na2CO3) used in the conversion?

• 105.99 grams per mole

• 100.99 grams per mole

• 110.99 grams per mole

• 95.99 grams per mole

Why do the units of moles cancel out during the conversion process?

• Because grams are on both the numerator and denominator

• Because the calculation is incorrect

• Because moles are on both the numerator and denominator

• Because the molar mass is incorrect

What is the final result in grams after converting 0.32 moles of sodium carbonate?

• 35.92 grams

• 32.92 grams

• 34.92 grams

• 33.92 grams

What is the purpose of multiplying by the molar mass in the conversion process?

• To convert grams to moles

• To convert moles to grams

• To determine the volume

• To find the number of atoms

What is the first step if you are given grams and need to find moles?

• Add the molar mass

• Subtract the molar mass

• Divide by the molar mass

• Multiply by the molar mass

What is the reverse process of converting moles to grams?

• Converting grams to moles by subtracting the molar mass

• Converting grams to moles by adding the molar mass

• Converting grams to moles by dividing by the molar mass

• Converting grams to moles by multiplying by the molar mass