Moles and Molar Mass Concepts

What is the value of Avogadro's number?

• 6.02 times 10 to the 23rd

• 6.02 times 10 to the 24th

• 6.02 times 10 to the 25th

• 6.02 times 10 to the 22nd

How many atoms are in 0.5 moles of helium?

• 3.01 times 10 to the 23rd

• 6.02 times 10 to the 23rd

• 1.5 times 10 to the 23rd

• 2.5 times 10 to the 23rd

What is the SI unit that measures the amount of matter in a substance?

• Mole

• Kilogram

• Gram

• Liter

How many molecules of water are there in 0.360 moles of water?

• 2.17 times 10 to the 22nd

• 2.17 times 10 to the 24th

• 2.17 times 10 to the 23rd

• 2.17 times 10 to the 25th

What is the molar mass of dinitrogen trioxide (N2O3)?

• 48.00 grams

• 16.00 grams

• 76.02 grams

• 28.02 grams

What is the mass of one mole of carbon atoms?

• 11.98 grams

• 12.01 grams

• 14.01 grams

• 10.81 grams

How many grams are in 9.45 moles of dinitrogen trioxide (N2O3)?

• 718 grams

• 76 grams

• 45 grams

• 94 grams

How many moles are in 92.2 grams of iron(III) oxide (Fe2O3)?

• 3.577 moles

• 0.577 moles

• 1.577 moles

• 2.577 moles

What is the molar mass of sodium chloride (NaCl)?

• 23 grams

• 35.45 grams

• 58.45 grams

• 18.02 grams

How many molecules are in 4.52 times 10 to the 24th molecules of water?

• 1340 grams

• 1.34 grams

• 13.4 grams

• 134 grams