Question 1

Which of the following best describes the difference between ionic and covalent compounds?

Accepted Answer

Ionic compounds are formed by the transfer of electrons from metals to nonmetals, while covalent compounds are formed by the sharing of electrons between nonmetals.

Question 2

What is the simplified form of $$\frac{a$$^{-8}$$}{a$$^{3}$$}$$?

Accepted Answer

$$a^{-5}$$

Question 3

Which of the following is NOT an oxidation-reduction (redox) reaction?

Accepted Answer

$$\mathrm{CO_2$\ (g) + 2\ LiOH\ (aq) \rightarrow Li_2CO_3\ (aq) + H_2O\ (l)}$$

Question 4

If 8 g of substance A is dissolved in 200 g of solution, what is the concentration of substance A in grams per gram of solution?

Accepted Answer

0.04 g/g

Question 5

A stock solution of NaOH is prepared by dissolving 25.00 g in 150.0 mL of water. What is the molarity of the stock solution? (Molar mass of NaOH = 40.00 g/mol)

Accepted Answer

$$4.17\ \mathrm{M}$$

Question 6

After diluting 50.0 mL of the NaOH stock solution to a total volume of 400.0 mL, what is the concentration of NaOH in the diluted solution?

Accepted Answer

$$0.52\ \mathrm{M}$$

Question 7

What is the volume (in mL) of $$7\ \mathrm{M}$$ HBr needed to prepare $$3.5\ \mathrm{L} of$$ $$2.7\ \mathrm{M}$$ HBr?

Accepted Answer

$$1350\ \mathrm{mL}$$

Question 8

Which equation is commonly used when preparing a diluted solution from a concentrated solution?

Accepted Answer

$$C_1V_1 = C_2V_2$$

Question 9

If the empirical formula of a compound is $$(\mathrm{C_3H_4O})$$ and its molar mass is found to be approximately $$120\ \mathrm{g/mol}$$, what is the molecular formula?

Accepted Answer

$$(\mathrm{C_6H_8O_2})$$

Question 10

Which of the following statements is true regarding the process of diluting a stock solution?

Accepted Answer

The total volume of solution increases during dilution.

Question 11

When aluminum (Al) combines with sulfur (S), what is the correct formula of the resulting compound?

Accepted Answer

$$\mathrm{Al_2S_3}$$

Question 12

Which of the following is the correct name for the compound formed between the polycation ammonium and the nonmetal iodine?

Accepted Answer

Ammonium iodide

Question 13

Which statements about the hydrogen isotope with a mass number of 2 are accurate? (Select all that apply)

Accepted Answer

The isotope is a stable form of hydrogen.

Question 14

Given that $$8\ \mathrm{g} of $$substance A in $$100\ \mathrm{g} of $$solution is equivalent to $$10\ \mathrm{g} of $$substance A in $$X$$ grams of solution, what is the value of $$X$$?

Accepted Answer

$$125\ \mathrm{g}$$

Question 15

What is the molecular weight of $$\mathrm{Na_3PO_4}$$?

Accepted Answer

$$163.94\ \mathrm{g/mol}$$

Question 16

How many moles of $$\mathrm{Na_3PO_4}$$ are present in $$300.0\ \mathrm{mL} of a$$ $$0.550\ \mathrm{M}$$ solution?

Accepted Answer

$$0.165$$ moles

Question 17

If the volume of a $$\mathrm{Na_3PO_4}$$ solution is doubled, what happens to the number of grams of $$\mathrm{Na_3PO_4}$$ present?

Accepted Answer

It remains the same.

Question 18

Which ions are involved in forming iron(II) carbonate?

Accepted Answer

$$\mathrm{Fe$$^{2+}$$}$$ and $$\mathrm{CO_3$^{2-}}$$

Question 19

What is the name of the compound formed when aluminum reacts with oxygen?

Accepted Answer

Aluminum oxide

Question 20

In a molecular compound, the atoms are held together by:

Accepted Answer

Covalent bonds

General Chemistry Exam 1 Study Guide – Step-by-Step Guidance

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