AnswersCHS Chemistry AEvidence of Chemical Reactions

Writing and Balancing Chemical Equations Answers

20 verified answers3 views
1
Free Preview

The compound CO2 is made of

A
two atoms of cobalt.
B
one atom of cobalt and two atoms of oxygen.
C
two atoms of carbon and one atom of oxygen.
D
one atom of carbon and two atoms of oxygen.
2
Free Preview

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

A
oxygen + water hydrogen
Option A
B
hydrogen + oxygen water
Option B
C
oxygen + water hydrogen + water
Option C
D
hydrogen + water oxygen
Option D
3

Which formula equation shows a reversible reaction?

A
mc010-1.jpg
Option A
B
mc010-2.jpg
Option B
C
mc010-3.jpg
Option C
D
mc010-4.jpg
Option D
4

According to the law of conservation of

A
charge
B
energy
C
mass
D
momentum
5

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).
Option A
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).
Option B
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).
Option C
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).
Option D
6

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).
Option A
B
2 upper M g (s) plus upper O subscript 2 (g) right arrow 2 upper M g upper O (s).
Option B
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).
Option C
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).
Option D
7

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
Option A
B
isopropanol carbon dioxide + water + oxygen
Option B
C
isopropanol + oxygen carbon dioxide + water + heat
Option C
D
isopropanol + oxygen + heat carbon dioxide + water
Option D
8

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

Question illustration
A
1
B
2
C
4
D
6
9

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)
10

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?

Question illustration
A
1
B
2
C
3
D
4
11

Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is the formula equation for this reaction?

A
Upper F subscript 2 (l) plus upper N a (s) right arrow upper N a upper F subscript 2 (s).
Option A
B
Upper F subscript 2 (g) plus upper C a (s) right arrow upper C a upper F subscript 2 (l).
Option B
C
Upper F subscript 2 (g) plus upper N a (s) right arrow with delta above upper N a upper F subscript 2 (l)
Option C
D
Upper F subscript 2 (g) plus upper C a (s) right arrow with delta above upper C a upper F subscript 2 (s).
Option D
12

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?

Question illustration
1
1
2
2
3
3
4
4
13

Consider the unbalanced equation for the oxidation of butene.C4H8 + 6O2 CO2 + H2OFor each molecule of C4H8 that reacts, how many molecules of carbon dioxide and water are produced?

Question illustration
A
two carbon dioxide molecules and two water molecules
B
four carbon dioxide molecules and four water molecules
C
two carbon dioxide molecules and four water molecules
D
four carbon dioxide molecules and two water molecules
14

The compound FeCl3 is made of

t
three molecules of iron chloride.
o
one atom of iron and three atoms of carbon.
o
one atom of iron and three atoms of chlorine.
t
two atoms of iodine, one atom of iron, and one atom of carbon.
15

Which chemical equation is unbalanced?

Question illustration
C
C + O2 CO2
Option C
S
Sr + O2 2SrO
Option S
6
6H2 + 3O2 6H2O
Option 6
H
H2 + H2 + O2 H2O + H2O
Option H
16

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

Question illustration
1
1
2
2
4
4
6
6
17

best

Question illustration
i
isopropanol carbon dioxide + water + heat
Option i
i
isopropanol carbon dioxide + water + oxygen
Option i
i
isopropanol + oxygen carbon dioxide + water + heat
Option i
i
isopropanol + oxygen + heat carbon dioxide + water
Option i
18

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?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
19

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

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
20

Which formula equation shows a reversible reaction?

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D

Did you find these answers helpful?

More from this Course

Quiz
10 verified answers

Evidence of Chemical Reactions

Quiz
10 verified answers

Evidence of Chemical Reactions

Quiz
10 verified answers

Evidence of Chemical Reactions