Measurement Review

What is the density of an object having a mass of 8.0 g and a volume of 25 cm³?

• 0.32 g/cm³
• 3.1 g/cm³
• 200 g/cm³
• 2.0 g/cm³

How many significant figures are in the measurement 40,500 mg?

• four
• five
• three
• two

Which group of measurements  is the most precise? (Each group of measurements is for a  different object)

• 2.0 g, 3.0 g, 4.0 g
• 1 g, 3 g, 5 g
• 2 g, 2.5 g, 3 g
• 2 g, 3 g, 4 g

In the measurement 0.503 L, which digit is the estimated digit?

• 5
• 3
• the 0 immediately to the left of the 3
• the 0 t the left of the decimal point

Density is found by dividing _____.

• area by mass
• mass by area
• mass by volume
• volume by mass

How many significant figures are in the measurement 811.40 grams?

• two
• three
• four
• five

Express the sum of 1111 km and 222 km using the correct number of significant figures.

• 1333.0 km
• 1300 km
• 1333 km
• 1330 km

Express the product of 2.2 mm and 5.00 mm using the correct number of significant digits.

• 11.0 mm²
• 11 mm²
• 11.00 mm²
• 10 mm²

The diameter of a carbon atom is 0.000 000 000 154 m.  What is this number expressed in scientific notation?

• 1.54 x 10^-10
• 1.54 x 10¹⁰
• 1.54 x 10^-12
• 1.54 x 10¹²

What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?

• 479 mL
• 4.34 mL
• 0.23 mL
• none of the above