Question 1

Which of the following best describes why chemistry is called the 'central science'?

Accepted Answer

Because knowledge of chemistry is essential for understanding concepts in biology, medicine, physics, geology, and other sciences.

Question 2

A sample of LDL has a mass of 0.380 g and a volume of 0.362 mL. What is its density in g/mL? Use $$d = \frac{m}{v}.$$

Accepted Answer

$$1.05\ \mathrm{g/mL}$$

Question 3

Which of the following is a chemical change?

Accepted Answer

Burning methane ($$\mathrm{CH}_4) in $$oxygen

Question 4

How many significant figures are in the measurement 0.00450 g?

Accepted Answer

3

Question 5

Convert 1.5 kilograms (kg) to grams (g).

Accepted Answer

$$1500\ \mathrm{g}$$

Question 6

A patient weighs 122 pounds. What is her weight in kilograms? (Use $$1\ \mathrm{kg} = 2.205\ \mathrm{lb})$$

Accepted Answer

$$55.3\ \mathrm{kg}$$

Question 7

Which of the following is a correct conversion factor for converting inches to centimeters?

Accepted Answer

$$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$

Question 8

A patient must receive 2.0 mg of medication per kilogram of body weight. If the patient weighs 186 lbs, how many mg should they receive? (Use $$1\ \mathrm{kg} = 2.205\ \mathrm{lb})$$

Accepted Answer

$$372\ \mathrm{mg}$$

Question 9

Which of the following statements about density is TRUE?

Accepted Answer

Density is a physical property and is independent of the amount of material.

Question 10

What is the mass, in grams, of 17.3 mL of titanium if its density is $$4.54\ \mathrm{g/mL}$$?

Accepted Answer

$$78.5\ \mathrm{g}$$

Question 11

Which of the following is NOT a base unit in the SI system?

Accepted Answer

inch (in)

Question 12

Which temperature is equivalent to $$0^\circ\mathrm{C}$$?

Accepted Answer

$$32^\circ\mathrm{F}$$

Question 13

How many millimeters (mm) is a blood cell that is $$6\ \mu\mathrm{m}$$ wide?

Accepted Answer

$$0.006\ \mathrm{mm}$$

Question 14

Which of the following numbers is considered an exact number?

Accepted Answer

The number of students in a classroom

Question 15

When adding $$12.11$$, $$18.0$$, and $$1.013$$, what is the answer with the correct number of significant figures?

Accepted Answer

$$31.1$$

Question 16

Which of the following is the correct formula for converting Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273$$

Question 17

A medication label reads '10 mg per cc'. How many mL are needed to deliver a 50 mg dose?

Accepted Answer

$$5\ \mathrm{mL}$$

Question 18

Which of the following is a correct statement about specific gravity?

Accepted Answer

Specific gravity is the ratio of the density of a substance to the density of water at $$4^\circ\mathrm{C}.$$

Chemistry and Measurements: Foundations for GOB Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard