Mole Unit - Review of Everything Day 1-6

How many moles are in 4.3 x 10²⁴ molecules of H₂O?

• 6.02 x 10²³
• 7.14
• 18.02
• 128.66 

How many molecules are in 100 g of C₆H₁₂O₆?

• 180.18 g
• 3.34 x 10²³
• 6.02 x 10²³
• 6.02 x 10²⁵

How many atoms of carbon are in 6.00g of carbon?

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

Tags

NGSS.HS-PS1-7

A chemical reaction produces 0.97 mol of Al. What volume will it occupy?

• 21.72

• 20.5

• 23.09

• 22.7

Find the percent composition of Cu₂S?

• %Cu= 67.987 %S= 32.013
• %Cu= 79.854   %S= 20.145
• %Cu= 35.946   %S= 64.054

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

• Mg₄N₃
• MgN₂
• Mg₃N₂ 
• MgN