Moles to Mass

Determine the number of moles of KNO₃ that are in 784 g of the compound.

• 7.7 mol

• 6.9 mol

• 10.6 mol

• 7.8 mol

Tags

NGSS.HS-PS1-7

What is the molar mass of one mole of HCl?

• 79.92 grams per mole of HCl

• 36.46 grams per mole of HCl

• 35.45 grams per mole of HCl

• 1.01 grams per mole of HCl

How many moles are in 20g of potassium (K)?

• 782 mol

• 512 mol

• 0.512 mol

• 0.023 mol

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

Tags

NGSS.HS-PS1-7

What is the mass of .072 moles of FeCl₃? (*Hint: molar mass is grams per 1 mole)

• 162.3 g

• 11.7 mols

• 11.7 g

• 11.7 g/mol

Tags

NGSS.HS-PS1-7

How many moles are in 2.35 g H₂O? (*Hint: molar mass is grams per 1 mole)

• 0.13 mols

• 13 mols

• 1.3 mols

• 130 mols

Tags

NGSS.HS-ESS2-5

How many moles are in 106.3 g of Copper, Cu? (*Hint: molar mass is grams per 1 mole)

• 167 moles

• 1.67 moles

• 16.7 moles

• .167 moles

Molar mass is in units of ________.

• grams (g)

• grams/mole (g/mol)

• mole (mol)

• moles/gram (mol/g)

Tags

NGSS.HS-PS1-7

How do you solve for grams?

• grams = molar mass/ mass

• grams = moles / molar mass

• grams = moles x molar mass

• grams= 1 mol x molar mass

What is the molar mass of one mole of water (H2O)?

• 18.02 grams per mole of H2O

• 20.02 grams per mole of H2O

• 16.00 grams per mole of H2O

• 1.01 grams per mole of H2O