Question 1

Active metals often form a protective oxide surface film that prevents further reaction of the metal with oxygen in the air. Which one of the following formulas for the metal oxide is not correct?

Accepted Answer

The answer of Active metals often form a protective oxide...

Question 2

Which one of these formula-name combinations is not correct?

Accepted Answer

Heptasulfur monoxide should be S₇O, not S₆O.

Question 3

Buffer solutions that maintain certain levels of pH or acidity are widely used in biochemical experiments. One common buffer system uses sodium dihydrogenphosphate and sodium monohydrogenphosphate. What are the formulas of these two compounds?

Accepted Answer

Sodium dihydrogenphosphate is NaHSO4, and sodium monohydrogenphosphate is Na2HPO4. The only choice that correctly represents these compounds is B, NaHSPO4 and Na2HPO4.

Question 4

What is the correct name for FeCl₃?

Accepted Answer

The answer of What is the correct name for FeCl₃? ...

Question 5

Radium often is found in uranium ores and can be separated from solutions by precipitation as radium sulfate. What is the formula for radium sulfate?

Accepted Answer

The formula for radium sulfate is RaSO4, as radium has a 2+ charge and sulfate has a 2- charge, so they combine in a 1:1 ratio. Choice A contains the symbol for radon (Rn) instead of radium (Ra) and an incorrect ratio of sulfur to uranium. Choices C, D, and E have incorrect ratios or symbols for the elements.

Question 6

Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation?

Accepted Answer

Zinc oxide is represented by the chemical formula ZnO, where Zn is the doubly charged cation and O is the anion.

Question 7

What is the formula for sodium bromide?

Accepted Answer

The symbol for sodium is Na and for bromine is Br, so when they combine they form NaBr as the formula for sodium bromide.

Question 8

Which anion is not labeled correctly?

Accepted Answer

The answer of Which anion is not labeled correctly?
...

Question 9

Aqua regia is a mixture of hydrochloric acid and nitric acid that is capable of dissolving gold. What are the formulas of these acids?

Accepted Answer

The formula for hydrochloric acid is HCl, and the formula for nitric acid is HNO3. Therefore, the formula for aqua regia is a mixture of HCl and HNO3, which is HCl + HNO3 = HNOCl2. However, when aqua regia reacts with gold, it forms chloroauric acid, which has the formula HAuCl4.

Question 10

The formula for a terbium phosphate compound is Tb₃(PO₄)₄. What would be the formula for a terbium sulfate compound given that the charge of terbium is the same in both compounds?

Accepted Answer

The answer of The formula for a terbium phosphate compound...

Question 11

The following salts are used in fireworks. Which one has an incorrect formula or is not named correctly?

Accepted Answer

The answer of The following salts are used in fireworks....

Question 12

Name the following oxides of nitrogen in this sequence: NO, N₂O, NO₂, N₂O₄.

Accepted Answer

The correct names for the oxides of nitrogen in the sequence given (NO, N2O, NO2, N2O4) are nitrogen monoxide, dinitrogen monoxide, nitrogen dioxide, dinitrogen tetroxide, respectively.

Question 13

Which of the following molecular compounds has an incorrect formula or is not named correctly?

Accepted Answer

The answer of Which of the following molecular compounds has...

Question 14

Titanium forms different ionic oxides. One, TiO₂, is a white oxide used in paints. What is the proper name for TiO₂?

Accepted Answer

The proper naming convention for binary ionic compounds is to use the element name of the cation (in this case, titanium) followed by the charge of the cation in Roman numerals in parentheses (IV) to indicate that titanium has a +4 oxidation state, followed by the element name of the anion (oxygen) with its suffix changed to -ide. Therefore, the proper name for TiO2 is titanium(IV) oxide. The formula TiOSUB1/B2/SUB2 indicates that there is one titanium ion (with a +2 oxidation state) and one oxide ion (with a -2 charge). This is not the proper naming convention for binary ionic compounds, so options A, C, D, and E can be eliminated.

Question 15

Sodium nitrite, which is used in meat processing, has been implicated as a possible health hazard because it can react with amines present in meat to form trace quantities of carcinogenic nitrosamines. What is the formula of sodium nitrite?

Accepted Answer

The answer of Sodium nitrite, which is used in meat...

Question 16

Which one of the following ionic compounds has an incorrect formula or is not named correctly?

Accepted Answer

The answer of Which one of the following ionic compounds...

Question 17

What is the proper name for Co(ClO₄)₃?

Accepted Answer

The compound Co(ClO4)3 is named cobalt(III) perchlorate. The "perchlorate" refers to the ClO4^- ion, and the "(III)" indicates the +3 oxidation state of cobalt.

Question 18

Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide?

Accepted Answer

The answer of Manganese(IV) oxide is a brown insoluble solid...

Question 19

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula __________, and sulfurous acid has the formula __________.

Accepted Answer

The answer of Sulfur combines with oxygen and hydrogen to...

Question 20

The Murrah Federal Building in Oklahoma City was destroyed on April 19, 1995, killing 168 people by a simple, but powerful, bomb made from 4800 lb of ammonium nitrate. What is the formula for ammonium nitrate?

Accepted Answer

The answer of The Murrah Federal Building in Oklahoma City...

Quiz 2: Atoms, Ions, and Molecules: Matter Starts Here

Active metals often form a protective oxide surface film that prevents further reaction of the metal with oxygen in the air. Which one of the following formulas for the metal oxide is not correct?

Which one of these formula-name combinations is not correct?

Buffer solutions that maintain certain levels of pH or acidity are widely used in biochemical experiments. One common buffer system uses sodium dihydrogenphosphate and sodium monohydrogenphosphate. What are the formulas of these two compounds?

What is the correct name for FeCl₃?

Radium often is found in uranium ores and can be separated from solutions by precipitation as radium sulfate. What is the formula for radium sulfate?

Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation?

What is the formula for sodium bromide?

Which anion is not labeled correctly?

Aqua regia is a mixture of hydrochloric acid and nitric acid that is capable of dissolving gold. What are the formulas of these acids?

The formula for a terbium phosphate compound is Tb₃(PO₄) ₄. What would be the formula for a terbium sulfate compound given that the charge of terbium is the same in both compounds?

The following salts are used in fireworks. Which one has an incorrect formula or is not named correctly?

Name the following oxides of nitrogen in this sequence: NO, N₂O, NO₂, N₂O₄.

Which of the following molecular compounds has an incorrect formula or is not named correctly?

Titanium forms different ionic oxides. One, TiO₂, is a white oxide used in paints. What is the proper name for TiO₂?

Sodium nitrite, which is used in meat processing, has been implicated as a possible health hazard because it can react with amines present in meat to form trace quantities of carcinogenic nitrosamines. What is the formula of sodium nitrite?

Which one of the following ionic compounds has an incorrect formula or is not named correctly?

What is the proper name for Co(ClO₄) ₃?

Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide?

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula , and sulfurous acid has the formula .

The Murrah Federal Building in Oklahoma City was destroyed on April 19, 1995, killing 168 people by a simple, but powerful, bomb made from 4800 lb of ammonium nitrate. What is the formula for ammonium nitrate?

Quiz 2: Atoms, Ions, and Molecules: Matter Starts Here

Active metals often form a protective oxide surface film that prevents further reaction of the metal with oxygen in the air. Which one of the following formulas for the metal oxide is not correct?

Which one of these formula-name combinations is not correct?

Buffer solutions that maintain certain levels of pH or acidity are widely used in biochemical experiments. One common buffer system uses sodium dihydrogenphosphate and sodium monohydrogenphosphate. What are the formulas of these two compounds?

What is the correct name for FeCl3?

Radium often is found in uranium ores and can be separated from solutions by precipitation as radium sulfate. What is the formula for radium sulfate?

Zinc oxide is found in ointments for the skin. What formula best describes this compound, which has Zn as a doubly charged cation?

What is the formula for sodium bromide?

Which anion is not labeled correctly?

Aqua regia is a mixture of hydrochloric acid and nitric acid that is capable of dissolving gold. What are the formulas of these acids?

The formula for a terbium phosphate compound is Tb3(PO4) 4. What would be the formula for a terbium sulfate compound given that the charge of terbium is the same in both compounds?

The following salts are used in fireworks. Which one has an incorrect formula or is not named correctly?

Name the following oxides of nitrogen in this sequence: NO, N2O, NO2, N2O4.

Which of the following molecular compounds has an incorrect formula or is not named correctly?

Titanium forms different ionic oxides. One, TiO2, is a white oxide used in paints. What is the proper name for TiO2?

Sodium nitrite, which is used in meat processing, has been implicated as a possible health hazard because it can react with amines present in meat to form trace quantities of carcinogenic nitrosamines. What is the formula of sodium nitrite?

Which one of the following ionic compounds has an incorrect formula or is not named correctly?

What is the proper name for Co(ClO4) 3?

Manganese(IV) oxide is a brown insoluble solid often found as a product of reactions of potassium permanganate. What is the formula of manganese(IV) oxide?

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula __________, and sulfurous acid has the formula __________.

The Murrah Federal Building in Oklahoma City was destroyed on April 19, 1995, killing 168 people by a simple, but powerful, bomb made from 4800 lb of ammonium nitrate. What is the formula for ammonium nitrate?

What is the correct name for FeCl₃?

The formula for a terbium phosphate compound is Tb₃(PO₄) ₄. What would be the formula for a terbium sulfate compound given that the charge of terbium is the same in both compounds?

Name the following oxides of nitrogen in this sequence: NO, N₂O, NO₂, N₂O₄.

Titanium forms different ionic oxides. One, TiO₂, is a white oxide used in paints. What is the proper name for TiO₂?

What is the proper name for Co(ClO₄) ₃?

Sulfur combines with oxygen and hydrogen to form two acids. Sulfuric acid has the formula , and sulfurous acid has the formula .