Unit 5 Moles and Molar Mass

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.

(0901) Which conversion factor would you use if you need to convert from MOLES to particles?

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To convert from particles to moles, you should use which of the following conversion factors ? ..

• 
• 
• 
• 

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Shivani measures out 6.0 moles of epsom salt (MgSO₄) to put in her bath. How many grams of MgSO₄ went in the bath?

• 3.6 x 10²⁴ g

• 720 g

• 0.050 g

• 340 g

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Determine the mass of 4.20 moles of C₆H₁₂

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

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How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)₃?

• 1.26 moles

• 0.8 moles

• 7,670 moles

• 1.63 x 10^-22 moles

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What is a mole?

• The standard “unit” for measuring the amount of particles in a substance.

• The abbreviation for the term molecule.

• The relative mass of one atom of an particular element.

• A dark, hairy spot on your arm.

Which would have more atoms?

• 1 mole of Li
• 1 mole of Au
• 1 mole of Si
• None, all are equal

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NGSS.MS-PS1-1

Molar mass is in units of ________.

• g

• g/mol

• mol

• mol/g

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

• 44.01 moles
• 1421.52 moles
• 32.3 moles
• 0.73 moles

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NGSS.HS-PS1-7