Q: Which of the following is the correct formula for calculating molarity?

$$\mathrm{M} = \frac{\text{moles solute}}{\text{liters solution}}$$

Question 1

Which of the following is the correct chemical symbol for the element potassium?

Accepted Answer

K

Question 2

Which prefix represents $$10^{-3} in $$the metric system?

Accepted Answer

milli

Question 3

Which type of radioactive decay emits a particle with the same mass as a helium nucleus?

Accepted Answer

Alpha decay

Question 4

What is the formula for ammonium ion?

Accepted Answer

$$\mathrm{NH_4$^+}$$

Question 5

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

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 6

A patient receives 250 mL of a 0.9% NaCl solution. What is the mass of NaCl administered? (Percent by mass: $$	ext{mass solute} / 	ext{mass solution} 	imes 100)$$

Accepted Answer

2.25 g

Question 7

Which of the following is the correct combined gas law equation?

Accepted Answer

$$\frac{P_1$ V_1$}{T_1$} = \frac{P_2$ V_2$}{T_2$}$$

Question 8

Which monosaccharide is an aldohexose?

Accepted Answer

D-glucose

Question 9

Which of the following is the correct cyclic structure for D-glucose?

Accepted Answer

A six-membered ring (pyranose) with the anomeric carbon at C1

Question 10

Which equation is used to calculate the dilution of a solution?

Accepted Answer

$$C_1$$ $$V_1$$ = $$C_2$$ $$V_2$$

Question 11

A solution is prepared by dissolving 5.0 g of NaCl in enough water to make 250 mL of solution. What is the concentration in $$\mathrm{g/L}$$?

Accepted Answer

20 $$\mathrm{g/L}$$

Question 12

Which of the following is a correct statement about the equilibrium constant $$K$$ for a chemical reaction?

Accepted Answer

It is calculated using the concentrations of products and reactants at equilibrium.

Question 13

Which of the following is the correct formula for calculating pH from $$[H^+]$$?

Accepted Answer

$$\mathrm{pH} = -\log [H^+]$$

Question 14

Which of the following is the correct abbreviation for the amino acid tryptophan?

Accepted Answer

Trp

Question 15

Which base pairs with cytosine in DNA?

Accepted Answer

Guanine

Question 16

Which process converts an alkane to an alkene?

Accepted Answer

Dehydrogenation

Question 17

Which of the following is a correct statement about the oxidation of alcohols?

Accepted Answer

Primary alcohols can be oxidized to aldehydes and then to carboxylic acids.

Question 18

Which of the following is the correct structure for D-fructose?

Accepted Answer

A five-membered ring (furanose) with the anomeric carbon at C2

Question 19

Which of the following is the correct formula for calculating molarity?

Accepted Answer

$$\mathrm{M} = \frac{	ext{moles solute}}{	ext{liters solution}}$$

GOB Chemistry: Key Memorization Topics and Concepts (Chapters 1–11)

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