Q: A patient has a temperature of 38.5 $$^\circC. $$What is this temperature in Fahrenheit?

$$F = (38.5 \times \frac{9}{5}) + 32 = 101.3^\circF$$

Q: A bottle of wine has 12% v/v ethanol and 100 mL of grape juice. What is the percent volume of ethanol in the solution?

12 mL ethanol in 112 mL solution, so $$\frac{12}{112} \times 100 = 10.7\%$$

Q: A woman has an initial lung volume of 2.7 L, which is filled with air at a pressure of 1.12 atm. If she increases her lung volume to 3.2 L, what is the new pressure in her lungs? (Assume temperature is constant)

$$P_2$$ = \frac{$$P_1$$ $$V_1$$}{$$V_2$$} = \frac{1.12 \times 2.7}{3.2} = 0.95\ \mathrm{atm}$$

Q: How many moles of $$CaCl_2$$ are in 250 mL of a 3.0 M $$CaCl_2$$ solution?

$$n = M \times V = 3.0\ \mathrm{mol/L} \times 0.250\ \mathrm{L} = 0.75\ \mathrm{mol}$$

Q: A sample of gas has a volume of 2.80 L at an unknown temperature. When the sample is submerged in water at 273 K, the volume decreases to 2.57 L. What was its initial temperature?

$$T_1$$ = \frac{$$V_1$$ $$T_2$$}{$$V_2$$} = \frac{2.80 \times 273}{2.57} = 297\ \mathrm{K}$$

Question 1

A patient has a temperature of 38.5 $$^\circC. $$What is this temperature in Fahrenheit?

Accepted Answer

$$F = (38.5 	imes \frac{9}{5}) + 32 = 101.3^\circF$$

Question 2

Which of the following compounds is a strong electrolyte?

Accepted Answer

Sodium chloride ($$NaCl)$$

Question 3

How many significant figures are in the measurement 0.00207?

Accepted Answer

3

Question 4

A solution contains 13 g of fat, 24 g of protein, and an unknown amount of carbohydrates. If the pizza contains 360 kcal, how many grams of carbohydrates does it contain? (Fat: 9 kcal/g, Protein: 4 kcal/g, Carbohydrate: 4 kcal/g)

Accepted Answer

38 g

Question 5

What is the molar mass of $$Ca(OH)_2$$?

Accepted Answer

$$74.10\ \mathrm{g/mol}$$

Question 6

Which of the following is the correct formula for barium sulfate?

Accepted Answer

$$BaSO_4$$

Question 7

A bottle of wine has 12% v/v ethanol and 100 mL of grape juice. What is the percent volume of ethanol in the solution?

Accepted Answer

12 mL ethanol in 112 mL solution, so $$\frac{12}{112} 	imes 100 = 10.7\%$$

Question 8

Which of the following is the correct balanced equation for the complete neutralization of $$H_3PO_4 by$$ $$Ca(OH)_2$$?

Accepted Answer

$$2H_3PO_4 + 3Ca(OH)_2 \rightarrow Ca_3$(PO_4$)_2 + 6H_2O$$

Question 9

A woman has an initial lung volume of 2.7 L, which is filled with air at a pressure of 1.12 atm. If she increases her lung volume to 3.2 L, what is the new pressure in her lungs? (Assume temperature is constant)

Accepted Answer

$$P_2$$ = \frac{$$P_1$$ $$V_1$$}{$$V_2$$} = \frac{1.12 	imes 2.7}{3.2} = 0.95\ \mathrm{atm}$$

Question 10

Which of the following molecules is a cis isomer?

Accepted Answer

A molecule with two identical groups on the same side of a double bond

Question 11

What is the difference between an isotope and an ion?

Accepted Answer

Isotopes have different numbers of neutrons; ions have different numbers of electrons

Question 12

How many moles of $$CaCl_2$$ are in 250 mL of a 3.0 M $$CaCl_2$$ solution?

Accepted Answer

$$n = M 	imes V = 3.0\ \mathrm{mol/L} 	imes 0.250\ \mathrm{L} = 0.75\ \mathrm{mol}$$

Question 13

Which of the following is the correct IUPAC name for the compound shown below?

$$\mathrm{CH_3CH_2CH_2OH}$$

Accepted Answer

Propanol

Question 14

What is the pH of a solution with a pOH of 2.7?

Accepted Answer

$$pH = 14 - pOH = 14 - 2.7 = 11.3$$

Question 15

Which of the following is a secondary amine?

Accepted Answer

Diethylamine

Question 16

A sample of gas has a volume of 2.80 L at an unknown temperature. When the sample is submerged in water at 273 K, the volume decreases to 2.57 L. What was its initial temperature?

Accepted Answer

$$T_1$$ = \frac{$$V_1$$ $$T_2$$}{$$V_2$$} = \frac{2.80 	imes 273}{2.57} = 297\ \mathrm{K}$$

Question 17

Which of the following is a common polysaccharide found in plants?

Accepted Answer

Starch

Question 18

Which of the following is the correct formula for lithium hydroxide?

Accepted Answer

$$LiOH$$

Question 19

Which of the following is the correct electron configuration for a potassium atom (K, atomic number 19)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^6$$\ $$4s^1$$

Organic Chemistry Final Exam Review: Key Concepts and Practice

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