Question 1

A hospital pharmacist needs to prepare 500 mL of a saline solution. If the density of the solution is $$1.05 \ \mathrm{g/mL}$$, what is the mass of the solution in kilograms?

Accepted Answer

$$0.525 \ \mathrm{kg}$$

Question 2

A patient receives an injection containing $$0.25 \ \mathrm{mg} of a $$drug. How many micrograms ($$\mu\mathrm{g}) of $$the drug did the patient receive?

Accepted Answer

$$250 \ \mu\mathrm{g}$$

Question 3

A sample of gold has a mass of $$96.5 \ \mathrm{g}$$ and a volume of $$5.00 \ \mathrm{mL}. $$What is the density of gold in $$\mathrm{g/mL}$$?

Accepted Answer

$$19.3 \ \mathrm{g/mL}$$

Question 4

A nurse needs to convert a patient's body temperature from $$39.0^\circ \mathrm{C} to $$Fahrenheit. What is the temperature in $$^\circ \mathrm{F}$$? (Use $$^\circ \mathrm{F} = \frac{9}{5} 	imes ^\circ \mathrm{C} + 32)$$

Accepted Answer

$$102.2^\circ \mathrm{F}$$

Question 5

A laboratory technician adds $$2.50 \ \mathrm{g} of $$sodium chloride to $$100.0 \ \mathrm{mL} of $$water. If the final solution has a density of $$1.02 \ \mathrm{g/mL}$$, what is the total mass of the solution?

Accepted Answer

$$104.5 \ \mathrm{g}$$

Question 6

Which of the following best describes a chemical change occurring in a real-world scenario?

Accepted Answer

A silver spoon tarnishing after being left out in the air

Question 7

A student records the mass of a sample as $$0.00450 \ \mathrm{g}. $$How many significant figures does this measurement have?

Accepted Answer

3

Question 8

A patient is given a nutritional supplement containing $$12 \ \mathrm{g} of $$protein, $$8 \ \mathrm{g} of $$fat, and $$30 \ \mathrm{g} of $$carbohydrate. Using $$4 \ \mathrm{kcal/g}$$ for protein and carbohydrate, and $$9 \ \mathrm{kcal/g}$$ for fat, what is the total caloric content of the supplement (rounded to the nearest ten)?

Accepted Answer

$$230 \ \mathrm{kcal}$$

Question 9

A piece of metal with a mass of $$50.0 \ \mathrm{g} is $$heated from $$25.0^\circ \mathrm{C} to$$ $$75.0^\circ \mathrm{C}$$, absorbing $$400 \ \mathrm{cal} of $$heat. What is the specific heat of the metal in $$\mathrm{cal/g}^\circ \mathrm{C}$$? (Use $$q = m c \Delta T)$$

Accepted Answer

$$0.16 \ \mathrm{cal/g}^\circ \mathrm{C}$$

Question 10

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have similar chemical properties

Question 11

A sample of a gas is compressed in a syringe. Which property of the gas allows it to be compressed?

Accepted Answer

The particles are far apart relative to their size

Question 12

A neutral atom of zinc has 30 protons and 34 neutrons. What is its mass number?

Accepted Answer

64

Question 13

Which of the following elements is a metalloid and commonly used in computer chips due to its semiconducting properties?

Accepted Answer

Silicon

Question 14

A radioactive isotope of sodium has a mass number of 25. How many neutrons does it have?

Accepted Answer

14

Question 15

A solution has a density of $$1.20 \ \mathrm{g/mL}. $$What is its specific gravity?

Accepted Answer

$$1.20$$

Question 16

Which of the following is the correct electron arrangement for potassium (atomic number 19)?

Accepted Answer

2,8,8,1

Question 17

A sample of iron with a mass of $$119 \ \mathrm{g} is $$placed in a graduated cylinder containing water. The water level rises from $$57 \ \mathrm{mL} to$$ $$72 \ \mathrm{mL}. $$What is the density of the iron?

Accepted Answer

$$7.9 \ \mathrm{g/mL}$$

Question 18

A patient is treated with cryosurgery at $$-196^\circ \mathrm{C}. $$What is this temperature in Kelvin? (Use $$K = ^\circ \mathrm{C} + 273)$$

Accepted Answer

$$77 \ \mathrm{K}$$

Question 19

Which of the following best describes valence electrons?

Accepted Answer

Electrons in the outermost energy level of an atom

CHEM 1306 Study Guide: Measurement, Matter, Energy, and Atomic Structure

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