AnswersChemistry 1A - Mr. KaanWriting and Balancing Chemical Equations

4.4 Writing and Balancing Chemical Equations Answers

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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
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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).
Option A
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).
Option B
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.
Option C
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).
Option D
3

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.
4

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)
5

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
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).
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
7

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
8

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
9

Which chemical equation is unbalanced?

A
C + O2 CO2
Option A
B
Sr + O2 2SrO
Option B
C
6H2 + 3O2 6H2O
Option C
D
H2 + H2 + O2 H2O + H2O
Option D
10

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

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