Exploring the Mole and Molar Mass Concepts

What is the main focus of today's lesson?

• Learning about the periodic table

• Learning to count atoms, formula units, and molecules

• Learning to balance chemical equations

• Learning about chemical reactions

In the rice experiment, what was the mass of six dozen grains of rice?

• 0.58 grams

• 0.21 grams

• 1.24 grams

• 1.94 grams

What is Avogadro's number?

• 32

• 12

• 6.02 times 10 to the 23rd

• 16

What is the molar mass of magnesium?

• 16 grams per mole

• 32 grams per mole

• 35.5 grams per mole

• 24.3 grams per mole

How do you find the molar mass of a compound?

• By subtracting the atomic masses of the elements in the compound

• By dividing the atomic masses of the elements in the compound

• By multiplying the atomic masses of the elements in the compound

• By adding the atomic masses of the elements in the compound

How many moles of atoms are in 8.0 grams of magnesium?

• 2.0 moles

• 0.33 moles

• 1.0 moles

• 0.5 moles

How many atoms are in 0.7 grams of helium?

• 2.0 times 10 to the 23rd atoms

• 0.33 times 10 to the 23rd atoms

• 6.02 times 10 to the 23rd atoms

• 1.1 times 10 to the 23rd atoms

What is the formula for calcium iodide?

• Ca2I2

• CaI

• Ca2I

• CaI2

What is the molar mass of calcium iodide?

• 293.9 grams per mole

• 24.3 grams per mole

• 40.1 grams per mole

• 126.9 grams per mole

How many molecules of water are in 4.8 moles of water?

• 2.89 times 10 to the 24th

• 1.61 times 10 to the 23rd

• 7.97 times 10 to the negative 24th

• 5.20 times 10 to the 25th