Question 1

Which of the following best describes the relationship between the quantum number $$l$$ and the shape of atomic orbitals?

Accepted Answer

The quantum number $$l$$ determines the shape of the orbital.

Question 2

A student mixes 2.0 mol of $$H_2$$ with 1.0 mol of $$O_2 to $$produce water. Which reactant is the limiting reagent?

Accepted Answer

$$O_2$$

Question 3

Which of the following is the correct balanced equation for the reaction between potassium phosphate and silver nitrate?

Accepted Answer

$$K_3PO_4 + 3AgNO_3 \rightarrow Ag_3PO_4 + 3KNO_3$$

Question 4

Which salt is produced by the neutralization of hydrochloric acid with magnesium hydroxide?

Accepted Answer

$$MgCl_2$$

Question 5

Consider the reaction: $$MgCl_2 + Pb$$($$NO_3)_2$$ \rightarrow $$PbCl_2 + Mg$$($$NO_3)_2$. If 41.0 mL of 0.314$ M H_3PO_4$ is used to neutralize 41.0$ mL of 0.317$ M $$KOH$$, what is the molarity of the H_3PO_4$ solution required?

Accepted Answer

$$0.211 M$$

Question 6

Which of the following is NOT a characteristic of a redox reaction?

Accepted Answer

Formation of a precipitate

Question 7

A sample of $$70.5 mg of $$potassium phosphate is added to $$155 mL of$$ $$0.0100 M $$silver nitrate. What is the limiting reactant in the reaction?

Accepted Answer

Silver nitrate

Question 8

How many grams of $$Na_2SO_4$$ are required to make $$0.500 L of$$ $$0.500 M$$ $$Na_2SO_4$$?

Accepted Answer

$$71.0 g$$

Question 9

Which of the following reactions is an example of a precipitation reaction?

Accepted Answer

$$AgNO_3 + $$NaCl \rightarrow AgCl + $$NaNO_3$$

Question 10

In the reaction $$2FeCl_3 + 3Mg \rightarrow 2Fe + 3MgCl_2$$, which element is being oxidized?

Accepted Answer

Mg

Question 11

A compound contains only carbon, hydrogen, and oxygen. Analysis of a sample showed it contained $$54.5\% C$$, $$9.1\% H$$, and $$36.4\% O by $$mass. What is the empirical formula?

Accepted Answer

$$C_2H_4O$$

Question 12

Which of the following best describes the process of titration?

Accepted Answer

A method to determine the concentration of a solution by reacting it with a solution of known concentration.

Question 13

Which of the following is the correct net ionic equation for the reaction between $$H_2SO_4$$ and $$NaOH$$?

Accepted Answer

$$H^+ + OH^- \rightarrow H_2O$$

Question 14

Which of the following is the correct molecular formula for magnesium nitrate?

Accepted Answer

$$Mg(NO_3$)_2$$

Question 15

In the reaction $$2H_2O_2 \rightarrow 2H_2O + O_2$, what is the oxidation state of oxygen in H_2O_2$?

Accepted Answer

$$-1$$

Question 16

Which of the following is a strong electrolyte?

Accepted Answer

$$NaCl$$

Question 17

What is the molarity of a solution containing $$0.500$$ mol of solute in $$1.00 L of $$solution?

Accepted Answer

$$0.500 M$$

Question 18

Which of the following is the correct formula for the salt produced in the reaction between $$H_3PO_4$$ and $$KOH$$?

Accepted Answer

$$K_3PO_4$$

Question 19

Which of the following is the correct balanced equation for the reaction between $$TiO_2$$ and $$C to $$produce $$Ti$$ and $$CO_2$$?

Accepted Answer

$$TiO_2 + 2C$$ \rightarrow Ti + 2CO$$

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