Molar Masses Answers

Which formula equation represents the burning of sulfur to produce sulfur dioxide?

A

Upper S (s) plus upper O subscript 2 (g) right arrow with delta above upper S upper O subscript 2 (g).

B

2 upper H subscript 2 upper s (s) plus 3 upper 0 subscript 2 (g) right arrow 2 upper H subscript 2 upper O (l) plus 2 upper S upper 0 subscript 2 (g).

C

4 upper F e upper S subscript 2 plus 11 upper O subscript 2 right arrow 2 upper F e subscript 2 upper O subscript 3 plus 8 upper S upper O subscript 2.

D

2 upper S upper O subscript 2 (g) plus upper O subscript 2 (g) right arrow with upper V subscript 2 upper O subscript 5 above arrow 2 upper S upper O subscript 3 (g).

2

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Which word equation shows hydrogen reacting with oxygen to form water?

A

oxygen + water hydrogen

B

hydrogen + oxygen water

C

oxygen + water hydrogen + water

D

hydrogen + water oxygen

3

Isopropanol burns in oxygen to yield carbon dioxide, water, and heat. Which word equation best represents this chemical reaction?

A

isopropanol carbon dioxide + water + heat

B

isopropanol carbon dioxide + water + oxygen

C

isopropanol + oxygen carbon dioxide + water + heat

D

isopropanol + oxygen + heat carbon dioxide + water

4

According to the law of conservation of

A

charge

B

energy

C

mass

D

momentum

5

The chemical equation for the formation of ammonia is unbalanced.3H2(g) + N2(g) NH3(g)If three molecules of hydrogen react with one molecule of nitrogen, how many molecules of ammonia would be formed?

A

1

B

2

C

3

D

4

6

What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?

A

Upper H upper C l (a q) plus upper N a upper O upper H (a q) right arrow upper N a upper C l (s) plus upper H subscript 2 upper O (l).

B

Upper H subscript 2 upper S upper O subscript 4 (a q) plus upper C a (upper O upper H) subscript 2 (a q q) right arrow upper C a upper S upper O subscript 4 (a q) plus 2 upper H subscript 2 upper O (l).

C

Upper H subscript 2 upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper N a subscript 2 upper A upper O subscript 4 (a q) plus 2 upper H subscript 2 upper O (l).

D

2 upper H subscript 3 upper P upper O subscript 4 (a q) plus 3 upper C a (upper O upper H) subscript 2 (a q) right arrow upper C a subscript 3 (upper PO upper O) subscript 4 (s) plus 6 upper H subscript 2 upper O (l).

7

Which chemical equation is unbalanced?

A

C + O2 CO2

B

Sr + O2 2SrO

C

6H2 + 3O2 6H2O

D

H2 + H2 + O2 H2O + H2O

8

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out?

A

25 degrees Celsius over a right arrow.

B

Delta over a right arrow.

C

2 a t m over a right arrow.

D

Upper P t over a right arrow.

9

Which statement best describes the formula equation Cl2(g) + 2KBr(aq) 2KCl(aq)+ Br2(l)?

A

Carbon iodide reacts with potassium bromide to form potassium carbon iodide and bromine.

B

Bromine gas reacts with a solution of potassium chloride to form potassium bromide and chlorine gas.

C

Potassium bromine gas reacts with liquid chlorine to form potassium chloride in solution and bromine gas.

D

Chlorine gas reacts with potassium bromide to form potassium chloride in solution and liquid bromine.

10

The compound FeCl3 is made of

A

three molecules of iron chloride.

B

one atom of iron and three atoms of carbon.

C

one atom of iron and three atoms of chlorine.

D

two atoms of iodine, one atom of iron, and one atom of carbon.

11

In a chemical equation, which symbol should be used to indicate that a substance is in solution?

A

(s)

B

(g)

C

(l)

D

(aq)

12

Which statement best describes the formula equation Cl2(g) + 2KBr(aq) 2KCl(aq)+ Br2(l)?

A

Carbon iodide reacts with potassium bromide to form potassium carbon iodide and bromine.

B

Bromine gas reacts with a solution of potassium chloride to form potassium bromide and chlorine gas.

C

Potassium bromine gas reacts with liquid chlorine to form potassium chloride in solution and bromine gas.

D

Chlorine gas reacts with potassium bromide to form potassium chloride in solution and liquid bromine.

13

According to the law of conservation of

A

charge

B

energy

C

mass

D

momentum

14

This formula equation is unbalanced.P4(s) + 6Cl2(g) PCl3(l) Which coefficient should be placed in front of PCl3 to balance this equation?

A

1

B

2

C

4

D

6

15

Which word equation shows hydrogen reacting with oxygen to form water?

A

oxygen + water hydrogen

B

hydrogen + oxygen water

C

oxygen + water hydrogen + water

D

hydrogen + water oxygen

16

What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?

A

Upper H upper C l (a q) plus upper N a upper O upper H (a q) right arrow upper N a upper C l (s) plus upper H subscript 2 upper O (l).

B

Upper H subscript 2 upper S upper O subscript 4 (a q) plus upper C a (upper O upper H) subscript 2 (a q q) right arrow upper C a upper S upper O subscript 4 (a q) plus 2 upper H subscript 2 upper O (l).

C

Upper H subscript 2 upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper N a subscript 2 upper A upper O subscript 4 (a q) plus 2 upper H subscript 2 upper O (l).

D

2 upper H subscript 3 upper P upper O subscript 4 (a q) plus 3 upper C a (upper O upper H) subscript 2 (a q) right arrow upper C a subscript 3 (upper PO upper O) subscript 4 (s) plus 6 upper H subscript 2 upper O (l).

17

The chemical equation for the formation of ammonia is unbalanced.3H2(g) + N2(g) NH3(g)If three molecules of hydrogen react with one molecule of nitrogen, how many molecules of ammonia would be formed?

A

1

B

2

C

3

D

4

18

The compound FeCl3 is made of

A

three molecules of iron chloride.

B

one atom of iron and three atoms of carbon.

C

one atom of iron and three atoms of chlorine.

D

two atoms of iodine, one atom of iron, and one atom of carbon.

19

Isopropanol burns in oxygen to yield carbon dioxide, water, and heat. Which word equation best represents this chemical reaction?

A

isopropanol carbon dioxide + water + heat

B

isopropanol carbon dioxide + water + oxygen

C

isopropanol + oxygen carbon dioxide + water + heat

D

isopropanol + oxygen + heat carbon dioxide + water

20

Which equation has both a liquid and a gas as products?

A

2 upper H g upper O (s) right arrow 2 upper H g (l) plus upper O subscript 2 (g).

B

2 upper M g (s) plus upper O subscript 2 (g) right arrow 2 upper M g upper O (s).

C

1 UJpper K upper C l upper O subscript 3 (s) right arrow 2 upper K upper C l (s) plus 3 upper O subscript 2 (g).

D

Upper M g (s) plus 2 upper H upper C l (a q) right arrow upper H subscript 2 (g) plus upper M g upper C l subscript 2 (a q).

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