Chem 1 Unit 6 Exam Review

The unit cm³ is used to express

• length

• mass

• volume

• time

The SI base units for time and temperature are

• hour and degree Celsius

• second and degree Celsius

• hour and Kelvin

• second and Kelvin

Which of these shows SI unit prefixes arranged in order from smallest to largest

• centi, milli, kilo

• milli, centi, kilo

• kilo, milli, centi

• kilo, centi, milli

A sample of bismuth has a mass of 343 g and a volume of 35.0 cm³. What is the density of bismuth?

• 0.102 g/cm³

• 9.80 g/cm³

• 378 g/cm³

• 1.20 x 10⁴ g/cm³

Which of these statements about density is true?

• Density is proportional to the amount of a substance

• Density is expressed in units of mL/cm³

• Density does not change with temperature

• Density may be used to help identify a material

Which of these is not an SI base unit?

• meter

• pound

• kelvin

• seconds

A student determined the density of aluminum by averaging the results of three density calculations. Each value was very different, but the average was equal to the accepted value for aluminum's density. The results of this investigation are best described as...

• accurate, but not precise

• precise, but not accurate

• both precise and accurate

• neither precise nor accurate

The measurement of 0.0265 g, rounded off to two significant figures, would be

• 0.026 g

• 0.027 g

• 0.03 g

• 0.030 g

In division and multiplication, the answer should have the same number of significant figures as the

• number in the calculation with the fewest significant figures

• number in the calculation with the most significant figures

• average number of significant figures in the calculation

• total number of significant figures in the calculation

The number of significant figures in the measurement 170.040 km is

• three

• four

• five

• six