Mole HW Quiz 2

Calculate the number of moles of chlorine atoms in 55g of copper (II) chloride.

• 0.41 moles

• 0.82 moles

• 1.6 moles

• .20 moles

Tags

NGSS.HS-PS1-7

Which has more molecules?

• 1 mole H₂O
• 1 mole Al(OH)₃
• 1 mole NaCl
• There are all the same

Tags

NGSS.MS-PS1-1

Calculate the % composition by mass of oxygen present in H₂SO₄.

• 16.3%
• 65.25%
• 32.6%
• 57.14%

How many molecules are present in 135 g of Teflon C₂F₄

• 6.13 x 10²³ molecules

• 5.13 x 10²³ molecules

• 8.13 x 10 ²³ molecules

• 9.13 x 10²³ molecules

Tags

NGSS.HS-PS1-7

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%