Significant Figures and Scientific Notation

Sig Figs

100

107.2 cm

What is 4 sig figs?

200

0.50200 nm

What is 5 sig figs?

300

Round 0.00023350 L to 3 significant figures.

What is 0.000234 L?

400

Round 77.0653 miles to three significant figures.

What is 77.1?

500

Round the distance to the moon, 384,400 km, to 2  significant figures and use scientific notation.

What is 3.8 x 10⁵ km?

Calculate!

100

When you add or subtract measured values, you round to the _____.

What is the "least number of decimal places"?

200

17.65 g - 4.337 g

What is 13.31 g?

300

180.156 kg + 342.4 kg

What is 522.6 kg?

400

(3.50 x 10² m)(6.450 x 10¹⁰ m)

What is 2.26 x 10¹³ m²?

500

(4.4 x 10⁷ g)/(2.25 x 10⁵ ml)

What is 2.0 x 10² g/ml?

Convert to SN

100

172 cg

What is 1.72 x 10² cg?

200

0.502 moles

What is 5.02 x 10^-1 moles?

300

123,453 atoms

What is 1.23453 x 10⁵ atoms?

400

310,000,000,000 m

What is 3.1 x 10¹¹ m?

500

0.000982 x 10^-3 kg (note: this is not proper scientific notation, so please fix it)

What is 9.82 x 10^-7 kg?

Convert to Decimal

100

3.69 x 10^-2 ml

What is 0.0369 ml?

200

1.56 x 10⁴ sec

What is 15600 sec?

300

2.59 x 10¹ lbs

What is 25.9 lbs?

400

7.36 x 10⁹ mm

What is 7,360,000,000 mm?

500

4.59 x 10^-7 tons

What is 0.000000459 tons

Dimensional Analysis and Density

100

612 g = ? mg

What is 612,000 mg?

200

A barrel of oil is exactly 42 gal. How many liters of oil are in the barrel? Use 1 gal = 3.785 L and round to proper sig figs.

What is 160 L?

300

Is a 197-lb weight lifter light enough to compete in a class limited to those weighing 90 kg or less?  Use 1 lb = 0.454 kg; show your calculation and answer yes/no

What is 89.4 kg? And what is Yes?

400

What is the mass of 6.00 cm³ of mercury (density = 13.5939 g/cm³)? (use D=M/V)

What is 81.6 g?

500

What is the volume of 25 g of iodine (density = 4.93 g/cm³)?

What is 5.1 ml?