1 and 2 Step Molar Conversions Review (2021)

How many moles are present in 0.098 g of HCl?

• 0.00083 mol

• 0.0027 mol

• 0.28 mol

• 3.6 mol

Tags

NGSS.HS-PS1-7

How many atoms are present in 5.00 g of Fe?

• 0.0895 atoms

• $3.36\times10^{18}$ atoms

• $1.88\times10^{21}$ atoms

• $5.39\times10^{22}$ atoms

How many molecules are in 2.10 mol CO?

•  $2.53\times\times10^{24}$  molecules

•  $3.79\times10^{24}$  molecules 

•  $3.49\times10^{-24}$  molecules

•  $1.26\times10^{24}$  molecules

Tags

NGSS.HS-PS1-7

What is the mass of 5.90 mol C₈H₁₈?

• 0.0512 g

• 19.4 g

• 389 g

• 673 g

Tags

NGSS.HS-PS1-7

What is the volume of 0.500 L of He gas at STP?

• 0.0335 L

• 11.2 L

• 16.8 L

• 22.4 L

160 g O₂ = _____ L

• 112 L

• 78.8 L

• 22.4 L

• 114.24 L

 $2.25\times10^{24}$  atoms Ca = _____ g

• 40 g

• 150 g

• 255.1 g

•  $9.02\times10^{24}$  g

Tags

NGSS.HS-PS1-7

What is the number of moles in 500 L of He gas at STP?

• 0.05 mol

• 0.2 mol

• 22 mol

• 90 mol

0.5 L CO₂ gas = _____ g

(assume STP)

• 0.48 g

• 1.96 g

• 0.49 g

• 0.98 g

Tags

NGSS.HS-PS1-7

 $6.02\times10^{23}$  atoms Ne gas = _____ L
(assume STP)

• 1.0 L

• 22.4 L

• 24 L

• 44.8 L