Q: Which of the following is the correct dimensional analysis setup to convert 10 inches to centimeters? (Given: $$1\ \mathrm{in} = 2.54\ \mathrm{cm})$$

$$10\ \mathrm{in} \times \frac{2.54\ \mathrm{cm}}{1\ \mathrm{in}}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more different kinds of elements in a fixed ratio.

Question 2

Which of the following is an example of a physical change?

Accepted Answer

Melting of ice into liquid water.

Question 3

A student measures the mass of a sample as 12.345 g. How many significant figures does this measurement have?

Accepted Answer

5

Question 4

Which of the following is an intensive property?

Accepted Answer

Density

Question 5

Which separation technique would be most appropriate to separate a mixture of sand and salt water?

Accepted Answer

Filtration

Question 6

A solution of salt in water is an example of which type of matter?

Accepted Answer

Homogeneous mixture

Question 7

Which of the following equations correctly converts a temperature from Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 8

A sample of water has a mass of 25.0 g and a volume of 24.5 mL. What is its density?

Accepted Answer

$$1.02\ \mathrm{g/mL}$$

Question 9

Which of the following is NOT a base SI unit?

Accepted Answer

Liter

Question 10

Which of the following statements about mixtures is correct?

Accepted Answer

Mixtures retain the properties of their components.

Question 11

A student records the following measurements: 2.1 m, 2.2 m, 2.0 m, and 2.1 m. The true value is 2.5 m. Which statement is correct?

Accepted Answer

The measurements are precise but not accurate.

Question 12

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 13

Which metric prefix represents $$10^{-6}$$?

Accepted Answer

Micro-

Question 14

Which of the following best describes the Law of Constant Composition?

Accepted Answer

The relative number of atoms of each element in a compound is the same in any sample.

Question 15

Convert 25.0 $$^\circC to $$Fahrenheit using the correct formula.

Accepted Answer

$$^\circ F = \frac{9}{5}(25.0) + 32 = 77.0^\circ F$$

Question 16

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Salad with lettuce, tomatoes, and cucumbers

Question 17

Which of the following best describes the process of distillation?

Accepted Answer

Separation based on differences in boiling points.

Question 18

A graduated cylinder contains 45.6 mL of water. After adding a metal object, the volume rises to 49.8 mL. If the mass of the object is 34.0 g, what is its density?

Accepted Answer

$$8.10\ \mathrm{g/cm^3$}$$

Question 19

Which of the following is the correct dimensional analysis setup to convert 10 inches to centimeters? (Given: $$1\ \mathrm{in} = 2.54\ \mathrm{cm})$$

Accepted Answer

$$10\ \mathrm{in} 	imes \frac{2.54\ \mathrm{cm}}{1\ \mathrm{in}}$$

Question 20

Which of the following is an extensive property?

Accepted Answer

Mass

Matter and Measurement: Foundations of Chemistry for Biology Students

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