G Unit 9 Topics 1-3 Review

Convert 0.00159 to scientific notation.

• 159x10⁵

• 159x10^-5

• 1.59x10³

• 1.59x10^-3

Match the following numbers with the correct number of significant figures.

• 4

• 120,000

• 2

• 1.234x10²

• 1

• 100,000

• 3

• 10,000.

• 5

• 0.00123

When converting from grams to moles, which conversion unit would you use?

• Avogadro's number

• Molar Mass

• 22.4 L/1 mol

• Molarity

What is the molar mass of silicon?

• 28.09 g / mol

• 28.09 g

• 14 amu

• 14 g / mol

How many molecules are in 10. moles of Helium?

• 224 molecules

• 2.5 molecules

• 6.0x10²⁴ molecules

• 0.045 molecules

What is the molar mass of potassium hydroxide?

(round your answer to 2 decimal places)

Mathematical Equivalence

ON

What is the mass of 9.5 moles of Al₂O₃?

• 5.7x10²³

• 0.093 g

• 1.6x10^-23

• 970 g

How many moles are in 2.0 L of a 1.5 M solution of H₂SO₄?

• 1.33 moles

• 1.3 moles

• 3 moles

• 3.0 moles