Molar Conversions

How many moles would make up a sample of 14.8 grams of NaBr?

• 0.14 mol

• 1,522.77 mol

• 1,522.77 g

• 6.95 g

How many molecules are present in 1.75 moles CO₂?

• 1.05 X 10²⁴ molecules

• 1.28 X 10^-22 molecules

• 2.91 X 10^-24 molecules

• 2.39 X 102²² molecules

How many atoms are present in 8.20 moles Cu?

• 4.94 x 10²⁴ atoms

• 1.36 x 10^-23 atoms

• 7.76 x 10²² atoms

• 3.14 x 10²⁶ atoms

How many atoms are present in 324 g Cr?

• 3.75 X 10²⁴ atoms

• 1.95 X 10²⁶ atoms

• 1.01 X 10²⁸ atoms

• 2.80 X 10^-20 atoms

How many molecules are present in 125 g CO₂?

• 1.71 X 10²⁴ molecules

• 7.53 X 10²⁵ molecules

• 3.31 X 10²⁷ molecules

• 9.14 X 10^-21 molecules

Tags

NGSS.HS-PS1-7

What would be the volume, in liters, of 23.5 grams of NO₂ gas?

• 11.44 L

• 43.86 L

• 48.27 L

• 0.087 L

What mass of argon gas contains the same number of atoms as 24.3 g of magnesium? 

• 39.93 g

• 18.01 g

• 79.82 g

• 57.24 g

Tags

NGSS.HS-PS1-7

What mass of calcium metal contains the same number of atoms as 24.3 g of magnesium?   

• 40.06 g

• 21.02 g

• 80.23 g

• 62.89 g

Tags

NGSS.HS-PS1-7

The molar mass of Ba(ClO₄)₂ is: 

• 336.23

• 335.14

• 337.45

• 336.36

In a lab, how much aluminum can be recovered from a sample of Al₂(SO₃)₃ that weighs 14.7 grams?

• 2.70 g

• 3.98 g

• 2.12 g

• 3.86 g

Tags

NGSS.HS-PS1-7