Unit 01 Post-Assessment Remediation (PAR)

What is the volume of a block expressed to the correct number of significant figures with correct units, given the following dimensions? length: 11.20 cm width: 4.65 cm height: 1.21 cm

• 63.0 cm³

• 63.00 cm³

• 63 cm³

• 6.30 cm

The measurement 0.41006 gram, rounded to three significant figures, is expressed as

• 0.41 g

• 0.410 g

• 0.4100 g

• 0.4101 g

Given the following observations from a lab:

a) a small amount of solid dissolves in a large amount of water.

b) the temperature of the solution is 26.5 °C.

Which of the following correctly characterizes these observations?

• quantitative and qualitative, respectively

• qualitative and quantitative, respectively

• both qualitative

• both quantitative

If the density of water is 1.00 g/mL and you calculated 0.993 g/mL from your data, what is your percent error?

• 0.700 %

• -0.700 %

• -0.704 %

• -0.007 %

The diagram shows a part of a Celsius thermometer. What is the temperature, in degrees Celsius, shown on the thermometer?

• 20.3

• 23.0

• 30.7

• 37.0

The basic unit of length in the metric system is the

• kilogram

• gallon

• liter

• meter

The basic unit of volume in the metric system is the

• kilogram

• gallon

• liter

• mass

Given the following data, what is the volume of water added to a beaker expressed to the correct number of significant figures? initial buret reading: 3.00 mL final buret reading: 14.60 mL

• 14.6 mL

• 14.60 mL

• 11.6 mL

• 11.60 mL

A sample of an element has a mass of 34.261 grams and a volume of 3.8 cubic centimeters. To which number of significant figures should the calculated density of the sample be expressed?

• 5

• 2

• 3

• 4

Which mass measurement contains four significant figures?

• 0.086 g

• 0.431 g

• 1003 g

• 3870 g