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?

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

Q: Convert 98.6 °F (normal body temperature) to Celsius.

$$(98.6 - 32) \times \frac{5}{9} = 37.0\ ^\circ\text{C}$$

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

$$1.36\ \text{g} \times 0.382 = 0.51952\ \text{g} = 520\ \text{mg}$$

Q: A 140 lb patient requires 28 mg/kg of a drug. What is the total dose in grams?

$$140\ \text{lb} \times \frac{1\ \text{kg}}{2.2\ \text{lb}} \times 28\ \text{mg/kg} = 1780.8\ \text{mg} = 1.78\ \text{g}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

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

Question 2

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

Accepted Answer

Sand and iron filings

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 an 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 elements is a micronutrient important for thyroid hormone production?

Accepted Answer

Iodine

Question 7

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

Accepted Answer

9

Question 8

Which of the following statements about significant figures is correct?

Accepted Answer

Trailing zeros in a number with a decimal point are significant.

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?

Accepted Answer

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

Question 10

Which of the following samples has the highest density?

Accepted Answer

A mass of 2.5 kg and a volume of 2.2 L

Question 11

Convert 98.6 °F (normal body temperature) to Celsius.

Accepted Answer

$$(98.6 - 32) 	imes \frac{5}{9} = 37.0\ ^\circ	ext{C}$$

Question 12

Which of the following is NOT a physical change?

Accepted Answer

Baking a cake

Question 13

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

Accepted Answer

$$1.36\ 	ext{g} 	imes 0.382 = 0.51952\ 	ext{g} = 520\ 	ext{mg}$$

Question 14

Which of the following best describes a liquid?

Accepted Answer

Indefinite shape but definite volume

Question 15

Which equation correctly relates Celsius and Kelvin temperatures?

Accepted Answer

$$K = ^\circ	ext{C} + 273$$

Question 16

A 140 lb patient requires 28 mg/kg of a drug. What is the total dose in grams?

Accepted Answer

$$140\ 	ext{lb} 	imes \frac{1\ 	ext{kg}}{2.2\ 	ext{lb}} 	imes 28\ 	ext{mg/kg} = 1780.8\ 	ext{mg} = 1.78\ 	ext{g}$$

Question 17

Which of the following is the correct order of attractions (strongest to weakest) among particles in the states of matter?

Accepted Answer

Solid \u003e liquid \u003e gas

Question 18

Which quantity measures the amount of space occupied by an object?

Accepted Answer

Volume

GOB Chemistry Chapter 1: Matter and Measurement Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard