Review: Sig figs, scientific notation & The Mole

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

How many significant figures does the following number have: 0.998005

• 9
• 10
• 6
• 5

Determine the number of Significant Figures in 10-L.

• 4
• 3
• 2
• 1

Determine the number of Significant Figures in 13410000-m.

• 4
• 3
• 2
• 1

Express 23400 in proper scientific notation. 

• 2.34 x 10⁴
• 2.3 x 10³
• 2.30 x 10⁵
• 2.34 x 10³

What is 78.5 rounded to one significant figure?

• 79
• 78.5
• 70
• 80

Calculate 1.23 m x 0.89 m and give your answer with the appropriate number of significant figures.

• 1.0 m²
• 1.1 m²
• 1.0947 m²
• 1.09 m²

Calculate 12.34 + 1.234 + 0.1234

• 13.6974
• 13.697
• 13.70
• 13.7

1345.567 / 23.56 = ? (Use significant figures!)

• 57.11
• 58.11
• 56.75
• 83.49

How would you write 564,000,000 in scientific notation?

• 5.64 x 10^-7
• 5.64 x 10⁶
• 5.64 x 10⁸
• 56.4 x 10⁷