Molar Mass

Calculate the mass of 5.0 mol of iron. HINT: You will need the molar mass of Iron.

• 8.3 x 10^-24 g

• 0.090 g

• 3.0 x 10²⁴ g

• 280 g

How many moles are in 16.94g of water? HINT: You will need the molar mass of H₂O.

• 16.94 mol H₂O

• 0.9401 mol H₂O

• 305.3 mol H₂O

• 1.063 mol H₂O

What is the molar mass of 2 moles of CO₂?

• 12 g/mol

• 44 g/mol

• 32 g/mol

• 88 g/mol

Tags

NGSS.HS-PS1-7

If a Chemistry experiment calls for 3.5 moles of MgCl₂ what mass should be weighed out on a digital scale? HINT: You will need the molar mass of Magnesium chloride.

• 333.2 g

• 95.2 g

• 3.5 g

• 45.3 g

If you have weighed out 36.0 grams of water on a scale, how many moles of water do you have? HINT: You will need the molar mass of H₂O.

• 18.0 moles

• 36.0 moles

• 2.0 moles

• 72.0 moles

How many grams are in 7.8 moles of NaCl?

• 476grams

• 460 grams

• 452 grams

• 462 grams

Which has a greater mass: 1 mole of scandium or 2 moles of boron?

• scandium

• boron

• neither

• more information is needed.

How many grams is 3.35 moles of water?

• 60.3 grams

• 66.2 moles

• 60.3 moles

• 6.35 grams

What is the molar mass of one molecule of Nitrogen N₂?

• 7.0 g/mol

• 14.0 g/mol

• 28.0 g/mol

• 24.0 g/mol

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol