Q: A patient needs 1500 mg of a medication. The liquid form is 100 mg/mL. How many mL should be administered?

$$\frac{1500\,\text{mg}}{100\,\text{mg/mL}} = 15\,\text{mL}$$

Q: A candy bar contains 12 g fat, 26 g carbohydrate, 6 g protein, and 4 g other material. What is the mass percent of fat in the candy bar?

$$\frac{12}{48} \times 100\% = 25\%$$

Q: A tablet weighs 1.36 g and contains 38.2% calcium carbonate. What is the mass of calcium carbonate in the tablet?

$$1.36 \times 0.382 = 0.51952\,\text{g}$$

Q: A patient weighs 140 lb. If the required dose is 28 mg/kg, what is the total dose in mg?

$$140\,\text{lb} \times \frac{1\,\text{kg}}{2.2\,\text{lb}} \times 28\,\text{mg/kg} = 1780.8\,\text{mg}$$

Question 1

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

Accepted Answer

Salad with dressing

Question 2

Which statement best describes a compound?

Accepted Answer

A pure substance made of two or more elements chemically joined together in a fixed ratio

Question 3

According to the Bohr model, which shell is closest to the nucleus?

Accepted Answer

K shell ($$n=1)$$

Question 4

Which principle states that no more than two electrons can occupy the same atomic orbital?

Accepted Answer

Pauli exclusion principle

Question 5

A patient needs 1500 mg of a medication. The liquid form is 100 mg/mL. How many mL should be administered?

Accepted Answer

$$\frac{1500\,	ext{mg}}{100\,	ext{mg/mL}} = 15\,	ext{mL}$$

Question 6

Which of the following has the highest density?

Accepted Answer

A mass of 2.5 kg and a volume of 2.2 L

Question 7

Which of the following is NOT a physical change?

Accepted Answer

Burning a log of wood

Question 8

What is the coefficient for $$O_2$$ when the following equation is balanced with the lowest whole number coefficients? $$C_3H_8O + O_2$ \rightarrow CO_2$ + H_2O$$

Accepted Answer

4.5

Question 9

A candy bar contains 12 g fat, 26 g carbohydrate, 6 g protein, and 4 g other material. What is the mass percent of fat in the candy bar?

Accepted Answer

$$\frac{12}{48} 	imes 100\% = 25\%$$

Question 10

Which of the following statements best describes a liquid?

Accepted Answer

Indefinite shape but definite volume

Question 11

A tablet weighs 1.36 g and contains 38.2% calcium carbonate. What is the mass of calcium carbonate in the tablet?

Accepted Answer

$$1.36 	imes 0.382 = 0.51952\,	ext{g}$$

Question 12

Which element is in period 4 and group 7B of the periodic table?

Accepted Answer

Mn

Question 13

Which of the following is a pure substance?

Accepted Answer

Gold

Question 14

How many significant figures are in the number 0.00458 g?

Accepted Answer

3

Question 15

Which of the following micronutrients is essential for thyroid hormone production?

Accepted Answer

Iodine

Question 16

A patient weighs 140 lb. If the required dose is 28 mg/kg, what is the total dose in mg?

Accepted Answer

$$140\,	ext{lb} 	imes \frac{1\,	ext{kg}}{2.2\,	ext{lb}} 	imes 28\,	ext{mg/kg} = 1780.8\,	ext{mg}$$

Question 17

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

Accepted Answer

$$F = (C 	imes 1.8) + 32$$

Question 18

Which of the following best describes the law of conservation of mass?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction

Question 19

Which of the following is the correct formula for density?

Accepted Answer

$$d = \frac{m}{V}$$

Chemistry Basics: Matter, Measurement, and the Foundations of GOB Chemistry

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