A sample contains 1.204×10^24 carbon atoms. How many moles of carbon are in the sample?

• 0.5
• 2
• 20
• 200

How many oxygen molecules are in 2 moles of O₂?

• 3.01×10^23
• 6.02×10^23
• 1.20×10^24
• 2.00×10^25

How many molecules are in 0.5 moles of water?

• 3.01×10^23
• 1.20×10^24
• 6.02×10^22
• 9.03×10^23

A balloon contains 9.03×10^24 nitrogen molecules. How many moles is this?

• 1.5
• 15
• 150
• 1500

How many atoms are in 0.25 moles of helium?

• 1.505×10^23
• 3.01×10^23
• 4.51×10^23
• 2.41×10^23

How many atoms are in 5 moles of sodium?

• 3.01×10^23
• 3.01×10^24
• 6.02×10^24
• 1.20×10^25

How many particles are in 1 mole of hydrogen?

• 6.02×10^22
• 6.02×10^23
• 1.20×10^24
• 9.03×10^23

A student has 5.0×10^23 chlorine atoms. About how many moles is this?

• 0.25
• 0.50
• 0.75
• 1.25

A scientist counts 1.806×10^24 particles. If this equals 3 moles, how many particles are in 1 mole?

• 6.02×10^22
• 6.02×10^23
• 1.20×10^24
• 3.01×10^23

Tags

NGSS.HS-PS1-7

A flask has 3.01×10^23 molecules of CO₂. How many moles of CO₂ is this?

• 0.25
• 0.50
• 1
• 2