Q: Convert $$2.75$$ kilograms to milligrams. Use the correct number of significant figures.

$$2.75 \times 10^6$\ \mathrm{mg}$$

Q: Which of the following is the correct conversion of $$384$$ liters to milliliters?

$$3.84 \times 10^5$\ \mathrm{mL}$$

Question 1

A patient receives 200 mg of ampicillin. The stock solution is supplied as 500 mg per 10 mL. How many mL of medication should the patient receive?

Accepted Answer

$$4.0\ \mathrm{mL}$$

Question 2

Which of the following best describes the shape and polarity of a carbon dioxide ($$\mathrm{CO}_2) $$molecule?

Accepted Answer

Linear, nonpolar

Question 3

How many significant figures are in the number $$0.014700$$?

Accepted Answer

$$6$$

Question 4

A piece of aluminum weighing $$156\ \mathrm{g} is $$heated from $$21.9^\circ\mathrm{C} to$$ $$128^\circ\mathrm{C}. $$The specific heat of aluminum is $$0.220\ \mathrm{cal}/\mathrm{g}^\circ\mathrm{C}. $$How many calories are needed to heat the aluminum?

Accepted Answer

$$3,646\ \mathrm{cal}$$

Question 5

Which of the following is the correct electron configuration for a neutral sodium ($$\mathrm{Na}) $$atom?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^1$$

Question 6

Convert $$2.75$$ kilograms to milligrams. Use the correct number of significant figures.

Accepted Answer

$$2.75 	imes 10^6$\ \mathrm{mg}$$

Question 7

Which of the following is the correct formula for aluminum sulfide?

Accepted Answer

$$\mathrm{Al}_2\mathrm{S}_3$$

Question 8

A $$25.0\ \mathrm{mL}$$ sample of an unknown liquid has a mass of $$17.2\ \mathrm{g}. $$What is the density of the liquid?

Accepted Answer

$$0.688\ \mathrm{g}/\mathrm{mL}$$

Question 9

Which orbital has the lowest energy in an atom?

Accepted Answer

$$1s$$

Question 10

What is the heat required to raise the temperature of $$567\ \mathrm{g} of $$ethanol from $$28.0^\circ\mathrm{C} to$$ $$75.5^\circ\mathrm{C}$$? The specific heat of ethanol is $$0.590\ \mathrm{cal}/\mathrm{g}^\circ\mathrm{C}.$$

Accepted Answer

$$15,800\ \mathrm{cal}$$

Question 11

Which of the following is a physical change?

Accepted Answer

Melting ice to form water

Question 12

Which of the following molecules is polar and has a bent shape?

Accepted Answer

$$\mathrm{H}_2\mathrm{O}$$

Question 13

A doctor orders dopamine for a patient who weighs $$186\ \mathrm{lbs}. $$The dose is $$2\ \mathrm{mg}/\mathrm{kg}. $$The stock solution is $$800\ \mathrm{mg}$$ per $$50\ \mathrm{mL}. $$How many mL should be given?

Accepted Answer

$$21\ \mathrm{mL}$$

Question 14

Which of the following is the correct formula for magnesium oxide?

Accepted Answer

$$\mathrm{MgO}$$

Question 15

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 16

What is the electron configuration for aluminum ($$\mathrm{Al}$$)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^1$$

Question 17

Which of the following is a homogeneous mixture?

Accepted Answer

Salt water

Question 18

How many electrons are in a neutral atom of phosphorus ($$\mathrm{P}$$)?

Accepted Answer

$$15$$

Question 19

Which of the following is the correct conversion of $$384$$ liters to milliliters?

Accepted Answer

$$3.84 	imes 10^5$\ \mathrm{mL}$$

GOB Chemistry Study Guide: Measurement, Atomic Structure, Bonding, and Chemical Calculations

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