Moles and Avogadro's Number

How many atoms of carbon are in 6.00g of carbon?

• 20x10²⁴atoms C

• 6.02x10²³atoms C

• 3.01x10²³atoms C

• 1.50x10²³atoms C

What is the mass of 0.89 mol of CaCl₂?

• 111 grams

• 0.008 grams

• 98.9 grams

• none of the choices

If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?

• 0.0129 g

• 120. g

• 187 g

• 9.33 g

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How does one get the mass of one mole of any element?

• Look up the average atomic mass from the periodic table

• Look up the atomic number from the periodic table

• Look up the number of neutrons of an atom

• Count Avogadro's Number of atoms and then put them on a balance

To change mass to atoms, how many conversion factors would need to be used?

• 2

• 3

• 1

• 5

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• 1.49 moles

• 0.746 moles

• 0.37 moles

• 1.74 moles

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How many particles are in one mole according to Avogadro's number?

• 2 x 10^24

• 6.022 x 10^22

• 6.022 x 10^23

• 3.14 x 10^22

If there are 6.022 x 10^23 particles, how many moles does that represent?

• 0.5 moles

• 2 moles

• 6 moles

• 1 mole

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What is the definition of a mole in chemistry?

• A mole is the weight of a substance in kilograms.

• A mole is a unit of mass in grams.

• A mole is 6.022 x 10^23 entities of a substance.

• A mole is a measure of temperature in Celsius.

Convert 3 moles of a substance to the number of particles.

• 3.0000 x 10^25 particles

• 1.2042 x 10^23 particles

• 1.8066 x 10^24 particles

• 2.5000 x 10^24 particles