Regents Review Unit 1: Safety, Math & Measurement

What is the temperature, in degrees Celsius, of a sample of matter at 35 K?

• –238°C

• –308°C

• 35°C

• 308°C

A student determines the density of a copper sample at room temperature to be 9.46 g/cm³. Based on Table S, what is the student’s percent error in determining the density of copper?

• 0.50%

• 5.0%

• 5.3%

• 5.6%

At room temperature, a student determines the density of a sample of nickel to be 9.79 g/cm³. Based on Table S, what is the student’s percent error for the density of nickel?

• 0.091%

• 0.10%

• 9.1%

• 10.%

A 26.7-gram sample of which element has a volume of 3.00 cubic centimeters at room temperature?

• Cr

• Cd

• Nb

• Ni

An aluminum sample has a mass of 80.01 g and a density of 2.70 g/cm³. According to the data, to what number of significant figures should the calculated volume of the aluminum sample be expressed?

• 1

• 2

• 3

• 4

How much water should be added to the graduated cylinder shown below to increase the volume to 15 milliliters?

• 11 mL

• 10 mL

• 3 mL

• 4 mL

The units of density could be

• milliliters per gram

• milliliters

• gram

• grams per milliliter

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 Kelvin temperature is equivalent to –24°C?

• 226 K

• 249 K

• 273 K

• 297 K

A student calculates the density of an unknown solid. The mass is 10.04 grams, and the volume is 8.21 cubic centimeters. How many significant figures should appear in the final answer?

• 1

• 2

• 3

• 4