Chemistry Ch. 3 Review

If the rules for significant figures are observed in the addition example shown, how should the total for this addition be rewritten?

35.7

432.33

5,142.312

5,610.342

• 5,610.00

• 5,610.340

• 5,610.34

• 5,610.3

Which of the following measurements has 2 significant figures?

• 403 s

• 30. s

• 20 s

• 0.1 s

• 3003 s

Which of these SI units would measure the volume of a substance?

• square meter

• square kilogram

• cubic meter

• cubic kilogram

Which one has 4 significant figures?

• 1.001
• 1000
• 0.004

0.000 000 45 kg

• 45 x 10⁶ kg
• 4.5 x 10^-7 kg
• 0.45 x 10^-6 kg
• 4.5 x 10^-6 kg

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

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

The density of aluminum is 2.70 g/cm3. Which conversion factor would you use to convert 525 grams of aluminum to volume?

• $\frac{2.70\ cm^3}{1\ g}$

• $\frac{1cm^3}{2.70\ g}$

• $\frac{2.70\ cm^3}{525\ g}$

Benzene is an organic liquid with a density of 0.902 g/mL. Which of the following is the correct dimensional analysis set up to calculate the mass of 55.9 mL of benzene?

•  $55.9\ mL\ \times\ \frac{0.902\ g}{1\ mL}\ =$  

•  $0.902\ g\ \times\ \frac{1\ mL}{55.9\ g}\ =$  

•  $0.902\ mL\ \times\ \frac{55.9\ g}{1\ mL}\ =$  

The density of copper is 8.98 g/cm3. Which of the following is the correct dimensional analysis set up to calculate the volume of 3.08 g of copper?

•  $8.98\ g\ \times\ \frac{3.08\ g}{1\ mL}\ =$  

•  $3.08\ g\ \times\ \frac{8.98\ g}{1\ cm^3}\ =$  

•  $3.08\ g\ \times\ \frac{1\ cm^3}{8.98\ g}\ =$