Grams to Molecules

If you have grams on top, what do you need on the bottom of the conversion factor to be?

• atoms

• particles

• grams

• moles

What is the formula to convert grams to moles?

• Divide the mass in grams by the molar mass

• Multiply the mass in grams by the molar mass

• Add the mass in grams to the molar mass

• Subtract the molar mass from the mass in grams

If you have 18 grams of water (H2O), how many moles of water do you have? (Molar mass of H2O = 18 g/mol)

• 1 mole

• 0.5 moles

• 2 moles

• 18 moles

Tags

NGSS.HS-PS1-7

How many molecules are there in 1 mole of a substance?

What is the first step in converting grams to molecules?

• Convert grams to moles

• Convert moles to grams

• Convert molecules to moles

• Convert moles to molecules

You have 44 grams of carbon dioxide (CO2). How many molecules of CO2 do you have? (Molar mass of CO2 = 44 g/mol)

Tags

NGSS.HS-PS1-7

Which of the following represents Avogadro's number?

Tags

NGSS.HS-PS1-7

If you have 2 moles of a substance, how many molecules do you have?

What is the molar mass of oxygen gas (O2)?

• 32 g/mol

• 16 g/mol

• 48 g/mol

• 64 g/mol

How do you calculate the number of molecules from moles?

• Multiply the number of moles by Avogadro's number

• Divide the number of moles by Avogadro's number

• Add Avogadro's number to the number of moles

• Subtract Avogadro's number from the number of moles