Mastering 2 Step Mole Conversions

What is Avogadro's number?

• 3.14 times 10 to the 23rd

• 6.02 times 10 to the 23rd

• 1.67 times 10 to the 24th

• 9.81 times 10 to the 22nd

What do you need to perform mole conversion problems?

• A thermometer

• A calculator

• A periodic table

• A ruler

When converting grams to atoms or molecules, what is the first step?

• Multiply by Avogadro's number

• Divide by the atomic mass

• Add the atomic mass

• Subtract Avogadro's number

If given the number of atoms or molecules, what is the first step in the conversion process?

• Multiply by the atomic mass

• Divide by Avogadro's number

• Add the atomic mass

• Subtract Avogadro's number

In the example of converting 25 grams of CO2 to molecules, what is the molar mass of CO2 used?

• 18.015 grams

• 28.01 grams

• 44.009 grams

• 32.00 grams

What is the final unit when converting grams of CO2 to molecules?

• Molecules

• Grams

• Moles

• Atoms

What is the purpose of using train tracks in mole conversion problems?

• To measure the length of the substance

• To calculate the volume of the substance

• To keep track of units and ensure correct calculations

• To determine the temperature of the substance

Why is it important to not round atomic or molar masses until the final answer?

• To avoid using a calculator

• To make the calculations easier

• To ensure accuracy in the final result

• To save time

In the example of converting 8.7 times 10 to the 23rd atoms of iron to grams, what is the atomic mass of iron used?

• 55.845 grams

• 26.982 grams

• 63.546 grams

• 12.011 grams

What is the final unit when converting atoms of iron to grams?

• Moles

• Atoms

• Grams

• Molecules