AnswersFL-2003350-Chemistry 1 Honors Sem 1 - FlexEvidence of Chemical Reactions

Writing and Balancing Chemical Equations Answers

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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
2
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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
3

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
4

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.
5

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)
6

According to the law of conservation of

A
charge
B
energy
C
mass
D
momentum
7

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.
Option A
B
Delta over a right arrow.
Option B
C
2 a t m over a right arrow.
Option C
D
Upper P t over a right arrow.
Option D
8

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
9

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

Question illustration
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

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

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