Question 1

A nurse needs to administer a medication with a dosage of 0.025 g. The medication is only available in milligrams. How many milligrams should the nurse administer?

Accepted Answer

$$25 \ \mathrm{mg}$$

Question 2

Which of the following numbers is correctly written in scientific notation with the correct number of significant figures for the measurement 0.00450?

Accepted Answer

$$4.50 	imes 10$$^{-3}$$

Question 3

A sample of a metal has a mass of $$15.0 \ \mathrm{g}$$ and a volume of $$3.00 \ \mathrm{cm}^3. $$What is the density of the metal?

Accepted Answer

$$5.00 \ \mathrm{g/cm}^3$$

Question 4

Which of the following is the correct formula for the compound formed between magnesium and nitrate ions?

Accepted Answer

$$\mathrm{Mg(NO}_3)_2$$

Question 5

Given the balanced chemical equation: $$2\mathrm{H}_2 + \mathrm{O}_2 \rightarrow 2\mathrm{H}_2\mathrm{O}$$, how many moles of water are produced when $$4.0$$ moles of hydrogen gas react with excess oxygen?

Accepted Answer

$$4.0$$ moles

Question 6

Which statement best describes the process of vaporization?

Accepted Answer

It is the change from liquid to gas at the boiling point.

Question 7

A solution is prepared by dissolving $$10.0 \ \mathrm{g} of $$NaCl in enough water to make $$500.0 \ \mathrm{mL} of $$solution. What is the mass/volume percent of NaCl in the solution?

Accepted Answer

$$2.0\%$$

Question 8

Which of the following best explains why breathing becomes more difficult at high altitudes using Boyle's Law?

Accepted Answer

The pressure of air decreases, so the volume of air inhaled must increase to obtain the same amount of oxygen.

Question 9

Which of the following is the correct name for the polyatomic ion $$\mathrm{SO}_4$$^{2-}$$?

Accepted Answer

Sulfate

Question 10

A patient receives $$250 \ \mathrm{mL} of a$$ $$0.9\% (m/v) $$NaCl solution. How many grams of NaCl did the patient receive?

Accepted Answer

$$2.25 \ \mathrm{g}$$

Question 11

Which of the following is a correct statement about isotonic, hypotonic, and hypertonic solutions?

Accepted Answer

An isotonic solution has the same solute concentration as the cell.

Question 12

Which of the following is the correct formula for the compound formed between calcium ions and phosphate ions?

Accepted Answer

$$\mathrm{Ca}_3(\mathrm{PO}_4)_2$$

Question 13

Which of the following best describes the tertiary structure of a protein?

Accepted Answer

The overall three-dimensional shape of a single polypeptide chain.

Question 14

Given the formula $$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$$, which type of biomolecule does this represent?

Accepted Answer

A monosaccharide

Question 15

Which of the following factors will NOT increase the rate of an enzyme-catalyzed reaction?

Accepted Answer

Increasing the temperature beyond the enzyme's optimal range

Question 16

A solution is made by diluting $$50.0 \ \mathrm{mL} of a$$ $$2.0 \ \mathrm{M}$$ NaCl solution to a final volume of $$200.0 \ \mathrm{mL}. $$What is the final concentration?

Accepted Answer

$$0.25 \ \mathrm{M}$$

Question 17

Which of the following is the correct balanced equation for the neutralization of hydrochloric acid with sodium hydroxide?

Accepted Answer

$$\mathrm{HCl} + \mathrm{NaOH} \rightarrow \mathrm{NaCl} + \mathrm{H}_2\mathrm{O}$$

Question 18

Which of the following is the correct name for the compound $$\mathrm{K}_2\mathrm{CO}_3$$?

Accepted Answer

Potassium carbonate

Question 19

Which of the following statements about acids and bases is correct?

Accepted Answer

An acid increases the concentration of $$\mathrm{H}^+$$ ions in solution.

Comprehensive Final Exam Objectives – GOB Chemistry Study Guide

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