Q: A patient is given a medication dose of $$0.250 \ \mathrm{g}. $$How many micrograms is this?

$$2.50 \times 10^5$ \ \mathrm{\mu g}$$

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

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 3

A patient receives an intravenous solution at a rate of $$250 \ \mathrm{mL/h}. If $$the solution has a density of $$1.02 \ \mathrm{g/mL}$$, how many grams of solution does the patient receive in 4 hours?

Accepted Answer

$$1020 \ \mathrm{g}$$

Question 4

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

Accepted Answer

Elements in the same group have similar chemical properties

Question 5

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 6

A nutrition label states that a snack contains 8 g of fat, 24 g of carbohydrate, and 4 g of protein. Using the caloric values (fat: $$9 \ \mathrm{kcal/g}$$, carbohydrate: $$4 \ \mathrm{kcal/g}$$, protein: $$4 \ \mathrm{kcal/g}$$), what is the total energy content in kilocalories?

Accepted Answer

$$164 \ \mathrm{kcal}$$

Question 7

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

Accepted Answer

Silicon

Question 8

A piece of metal is dropped into a graduated cylinder containing water. The water level rises from $$45.0 \ \mathrm{mL} to$$ $$53.5 \ \mathrm{mL}. If $$the mass of the metal is $$68.0 \ \mathrm{g}$$, what is its density?

Accepted Answer

$$8.00 \ \mathrm{g/mL}$$

Question 9

Which of the following best describes the arrangement of electrons in a neutral atom of potassium ($$Z=19$$)?

Accepted Answer

$$2,8,8,1$$

Question 10

A laboratory thermometer reads $$-196^\circ \mathrm{C}$$ for a sample of liquid nitrogen. What is the temperature in Kelvin?

Accepted Answer

$$77 \ \mathrm{K}$$

Question 11

A sample of iron with a mass of $$35.0 \ \mathrm{g} is $$heated from $$25.0^\circ \mathrm{C} to$$ $$35.0^\circ \mathrm{C}. If $$the specific heat of iron is $$0.108 \ \mathrm{cal/g}^\circ \mathrm{C}$$, how many calories are absorbed?

Accepted Answer

$$38 \ \mathrm{cal}$$

Question 12

Which of the following substances will float in water, which has a density of $$1.00 \ \mathrm{g/mL}$$?

Accepted Answer

Balsa wood ($$D = 0.16 \ \mathrm{g/mL})$$

Question 13

A neutral atom has 17 protons, 18 neutrons, and 17 electrons. What is the mass number of this atom?

Accepted Answer

$$35$$

Question 14

Which of the following is a property of a solid?

Accepted Answer

The particles have fixed positions and are very close together

Question 15

A patient is given a medication dose of $$0.250 \ \mathrm{g}. $$How many micrograms is this?

Accepted Answer

$$2.50 	imes 10^5$ \ \mathrm{\mu g}$$

Question 16

Which of the following best describes the distance between particles in a gas?

Accepted Answer

Very large relative to the size of the molecules

Question 17

A sample of ethanol has a mass of $$63.2 \ \mathrm{g}$$ and a volume of $$80.0 \ \mathrm{mL}. $$What is the density of ethanol?

Accepted Answer

$$0.790 \ \mathrm{g/mL}$$

Question 18

Which of the following is an example of a physical change in a medical context?

Accepted Answer

Crushing a tablet before dissolving it in water

Question 19

A neutral atom of sodium has a mass number of 25. How many protons and neutrons does it have?

Accepted Answer

11 protons and 14 neutrons

Question 20

Which of the following best describes valence electrons?

Accepted Answer

Electrons in the outermost energy level of an atom

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