Question 1

Based on its position in the periodic table, which single atom would you predict to form a compound with two nitrate polyatomic ions?

Accepted Answer

Looking at the periodic table, we see that calcium (Ca) is a group 2 element, which means it has two valence electrons available for bonding. Nitrate polyatomic ions have a charge of -1 each, so a compound with two nitrate ions would have a total charge of -2. Therefore, the calcium ion (Ca2+) would be able to bond with two nitrate ions (NO3-) to achieve a neutral compound with the formula Ca(NO3)2.

Question 2

Which polyatomic ion is not labeled correctly?

Accepted Answer

The polyatomic ion labeled as "CNF1F1F1S1^F1F1F10" is not correct. The correct label for the cyanate ion is "OCN1".

Question 3

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 4

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 formula for sodium nitrite is NaNO₂, where Na is sodium and NO₂ is the nitrite ion.

Question 5

What is the formula for calcium nitride?

Accepted Answer

Calcium nitride is formed by the combination of calcium ions (Ca²⁺) and nitride ions (N³⁻). To balance the charges, three calcium ions are needed for every two nitride ions, resulting in the formula Ca₃N₂.

Question 6

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. Option B is the only choice with RaSO4 as one of the options.

Question 7

The formula for a lutetium carbonate compound is Lu₂(CO₃)₃. What would be the formula for a lutetium nitrate compound given that the charge of lutetium is the same in both compounds?

Accepted Answer

To write the formula of a compound, we need to balance the charges of the ions involved. The given compound has carbonate (CO3^2-) as the anion, and therefore the charge on the cation (lutetium, Lu) must be +3 to balance the overall charge of the compound, which is 0. Similarly, for a nitrate (NO3^-) compound, the charge on Lu must be +3 to balance the negative charge from the nitrate ion. Therefore, the formula of the lutetium nitrate compound will be Lu(NO3)3. Since the subscript for nitrate is 3, we don't need to indicate it in the formula. The correct choice is C, which has the correct formula for lutetium nitrate.

Question 8

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

Manganese(IV) oxide is represented by the chemical formula MnO₂, where manganese is in the +4 oxidation state.

Question 9

Copper(II) sulfate is a common fungicide. What is the correct formula for copper(II) sulfate?

Accepted Answer

The correct formula for copper(II) sulfate is CuSO4, where Cu represents copper, S represents sulfur, and O represents oxygen. The Roman numeral II in parentheses after copper indicates that it has a charge of +2, while the subscript 4 after sulfate indicates that it contains four oxygen atoms. Option B correctly represents this formula.

Question 10

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

The formula for zinc oxide is ZnO, where Zn is a doubly charged cation and O is an anion. This is the only choice that includes Zn and O in the correct ratio and with the correct charges. The other choices involve sulfur, which is not present in zinc oxide.

Question 11

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 12

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 13

What is the correct name for Ni(NO₂)₂?

Accepted Answer

The correct name for the compound is nickel(II) nitrite. The Roman numeral (II) indicates the oxidation state of nickel, and the ending -ite indicates that the compound contains nitrogen and has one less oxygen than the -ate ending (which is used for nitrate).

Question 14

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

Accepted Answer

The correct formula for tetraphosphorus heptoxide is P₄O₇, not P₄O₆.

Question 15

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 has the formula NaHSO4, and sodium monohydrogenphosphate has the formula Na2HPO4. The options with these formulas are B and C. However, in option C, there is an extra hydrogen ion (H+) that is not present in the original compounds. Therefore, the correct option is B, with the formulas: NaHSPO4 and Na2HPO4.

Question 16

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

MgO₂ is not correct because magnesium oxide is MgO, not MgO₂.

Question 17

Which anion is not labeled correctly?

Accepted Answer

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

Question 18

Based on its position in the periodic table, which single atom would you predict to form a compound with two ammonium ions?

Accepted Answer

Sulfur typically forms a -2 charge, which would balance the +1 charge of two ammonium ions (NH4+), resulting in a neutral compound.

Question 19

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 ionic compounds involves indicating the charge on the metal ion, which in this case is titanium. The formula TiO₂ indicates that there is one titanium ion (Ti4+) and one oxide ion (O2-) present in the compound, so the correct name is titanium(IV) oxide. Therefore, the best choice is B.

Question 20

What is the correct name for FeCl₃?

Accepted Answer

Iron(III) chloride is the correct name for FeCl3, indicating iron in the +3 oxidation state.

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

Based on its position in the periodic table, which single atom would you predict to form a compound with two nitrate polyatomic ions?

Which polyatomic ion is not labeled correctly?

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?

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?

What is the formula for calcium nitride?

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?

The formula for a lutetium carbonate compound is Lu₂(CO₃) ₃. What would be the formula for a lutetium nitrate compound given that the charge of lutetium is the same in both compounds?

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?

Copper(II) sulfate is a common fungicide. What is the correct formula for copper(II) sulfate?

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

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

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

What is the correct name for Ni(NO₂) ₂?

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?

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 anion is not labeled correctly?

Based on its position in the periodic table, which single atom would you predict to form a compound with two ammonium ions?

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

What is the correct name for FeCl₃?

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

Based on its position in the periodic table, which single atom would you predict to form a compound with two nitrate polyatomic ions?

Which polyatomic ion is not labeled correctly?

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?

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?

What is the formula for calcium nitride?

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?

The formula for a lutetium carbonate compound is Lu2(CO3) 3. What would be the formula for a lutetium nitrate compound given that the charge of lutetium is the same in both compounds?

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?

Copper(II) sulfate is a common fungicide. What is the correct formula for copper(II) sulfate?

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

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

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

What is the correct name for Ni(NO2) 2?

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?

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 anion is not labeled correctly?

Based on its position in the periodic table, which single atom would you predict to form a compound with two ammonium ions?

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

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?

The formula for a lutetium carbonate compound is Lu₂(CO₃) ₃. What would be the formula for a lutetium nitrate compound given that the charge of lutetium is the same in both compounds?

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

What is the correct name for Ni(NO₂) ₂?

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

What is the correct name for FeCl₃?