Mole Concept

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How many moles are 98.3 grams of aluminum hydroxide, Al(OH)₃? (Atomic mass of Al = 27, H= 1, O = 16)

• 1.26 moles

• 0.8 moles

• 7,673.4 moles

• 150 moles

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NGSS.HS-PS1-7

How many atoms are contained in 25 g of NaBr? (Atomic mass of Na = 23, Br = 35)

• 102.96 molecules

• 0.24 molecules

• 1.45x10²³ molecules

• 2.34 x 10²⁰molecules

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NGSS.HS-PS1-7

Identify the number of Chlorine atoms in 65.8 g CaCl_2.

• 7.14 x 10²³ atoms

• 8.71 x 10²³ atoms

• 1.22 x 10²³ atoms

• 3.57 x 10²³ atoms

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)₃? (Ar Al=27, H=1, O=16)

• 1.26 moles

• 0.8 moles

• 7,673.4 moles

• 150 moles

Tags

NGSS.HS-PS1-7

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.0500 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5.00 moles

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NGSS.HS-PS1-7

How many molecules are in 2.00 moles of H₂O?

• 124x10²⁴ molecules of H₂O
• 1.20x10²³ molecules of H₂O
• 1.20x10²⁴ molecules H₂O
• 124

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NGSS.HS-PS1-7

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg
• 9.03x10²⁴ atoms Hg
• 903 atoms of Hg
• 9.03 atoms of Hg

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NGSS.HS-PS1-7

How many grams are in 1.2 x 10²⁴ molecules of CO? (molar mass of CO = 28 g/mol)

• 28.2 g

• 55.8 g

• 6.02 g

• 1.2 g

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NGSS.HS-PS1-7