Q: Which equation is used to calculate the molarity of a solution?

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

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

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Q: Which of the following is the correct formula for calculating percent composition by mass?

$$\%\ \text{composition} = \frac{\text{mass of element}}{\text{total mass of compound}} \times 100$$

Question 1

Which of the following best describes the difference between a covalent bond and an ionic bond?

Accepted Answer

A covalent bond involves the sharing of electrons between atoms, while an ionic bond involves the transfer of electrons from one atom to another.

Question 2

Which equation correctly relates the energy of a photon to its frequency?

Accepted Answer

$$E = h 	imes f$$

Question 3

A student mixes 50.0 mL of 1.0 M NaCl with 50.0 mL of 2.0 M NaCl. What is the final concentration of NaCl in the mixture?

Accepted Answer

$$1.5\ \mathrm{M}$$

Question 4

Which of the following statements about periodic trends is correct?

Accepted Answer

Ionization energy decreases down a group.

Question 5

Which of the following is the correct electron configuration for a neutral oxygen atom?

Accepted Answer

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

Question 6

A sample of gas occupies 2.0 L at 1.0 atm and 300 K. What will be its volume at 2.0 atm and 300 K? (Assume ideal gas behavior.)

Accepted Answer

$$1.0\ \mathrm{L}$$

Question 7

Which of the following best explains why water is a polar molecule?

Accepted Answer

Water has a bent molecular geometry and an unequal distribution of electrons.

Question 8

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

Accepted Answer

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

Question 9

Which of the following is a correct statement about the law of conservation of mass?

Accepted Answer

The total mass of reactants equals the total mass of products in a chemical reaction.

Question 10

A chemical reaction has the following balanced equation: $$2H_2 + O_2$ \rightarrow 2H_2O. If $$you start with 4 moles of $$H_2$$ and excess $$O_2$$, how many moles of $$H_2O$$ will be produced?

Accepted Answer

4 moles

Question 11

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

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 12

Which of the following best describes a solution?

Accepted Answer

A homogeneous mixture of two or more substances.

Question 13

Which of the following is NOT a strong electrolyte?

Accepted Answer

C_6H_{12}$$O_6 (aq)$$

Question 14

Which of the following is the correct formula for calculating percent composition by mass?

Accepted Answer

$$\%\ 	ext{composition} = \frac{	ext{mass of element}}{	ext{total mass of compound}} 	imes 100$$

Question 15

A student dissolves 10.0 g of NaCl in enough water to make 500 mL of solution. What is the molarity of the solution? ($$	ext{Molar mass of NaCl} = 58.44\ \mathrm{g/mol})$$

Accepted Answer

$$0.342\ \mathrm{M}$$

Question 16

Which of the following best explains why noble gases are generally unreactive?

Accepted Answer

They have full valence electron shells.

Question 17

Which of the following is the correct formula for the ideal gas law?

Accepted Answer

$$PV = nRT$$

Question 18

Which of the following is a correct statement about endothermic reactions?

Accepted Answer

Endothermic reactions absorb heat from the surroundings.

Question 19

Which of the following is the correct formula for calculating the number of moles from mass and molar mass?

Accepted Answer

$$	ext{moles} = \frac{	ext{mass}}{	ext{molar mass}}$$

General Chemistry I (CH105) Syllabus and Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard