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GENC MOD (13-15) QUIZ 3 BALANCING EQUATIONS > PRETEST > Flashcards

PRETEST Flashcards

1
Q

Carl Channel Aguilar, a handsome chemist conduct a laboratory experiment a lithium and water in gaseous form. What will be the end product?

A

lithium oxide and hydrogen gas

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2
Q

When calcium nitrate is decomposed. What will be the end product?

A

calcium oxide and dinitrogen pentoxide

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3
Q

When metal reacts with steam. What type of reaction is this?

A

single replacement

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4
Q

Balanced chemical equations imply which of the following?

A

Numbers of atoms are conserved in chemical change.

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5
Q

Sulfuric acid from a battery was spilled onto a marble floor. The liquid began to fizz as a gas was produced. What gas was probably produced?

A

sulfur trioxide

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6
Q

What coefficient should be placed when the following equation is balanced?

C12H26 + O2 = H2O + CO2

A

2C12H26 + 37O2 = 24 H2O + 26 CO2

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7
Q

a young handsome scientist made an experiment between strontium and steam. What will be the final product of this reaction?

A

strontium oxide and hydrogen gas

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8
Q

The following equation represents a reaction between a solution of a substance Z and an acid. Solution Z + dilute acid —> sodium sulfate and water What is the nature of solution Z?

A

a base

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9
Q

What information is required to write a chemical equation for a chemical reaction?

A

the formulas of the reactants and products

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10
Q

The general form of a single replacement reaction is _______________

A

element + compound —-> element + compound

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11
Q

Burning of magnesium ribbon is an example of a ________ reaction.

A

combination

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12
Q

Heating of solid cupric carbonate forms __________

A

CuO + CO2

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13
Q

The starting materials in a chemical reaction are known as ___________.

A

reactants

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14
Q

If an iron nail is placed into an aqueous solution of copper (II) sulfate solution, the iron displaces the copper ions in solution, and copper metal forms on the nail. Which is the correct word equation for this reaction?

A

iron + copper (II) sulfate —> copper + iron (II) sulfate

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15
Q

The general form of a metathesis (DOUBLE DISPLACEMENT) reaction is _______________

A

compound + compound —-> compound + compound

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16
Q

What coefficient should be placed when the following equation is balanced?

Fe(OH)3 = Fe2O3 + H2O

A

3

16
Q

What coefficient should be placed when the following equation is balanced?

C17H34 + O4 = H2O + CO2

A

2C17H34 + 51 O2 = 34 H2O + 34 CO2

17
Q

A grade 11 student found a reaction between aluminum chloride and oxalic acid. What type of reaction is this?

A

METATHESIS

18
Q

A grade 11 student found a reaction between aluminum chloride and oxalic acid. What will be the end product?

A

aluminum oxalate and hydrochloric acid

19
Q

A grade 11 student found a reaction between aluminum chloride and oxalic acid. What coefficient should be placed when the following equation is balanced?

A

2 aluminum chloride + 3 oxalic acid —> aluminum oxalate + 6 hydrochloric acid

20
Q

What coefficient should be placed when the following equation is balanced?

C20H40 + O2 = H2O + CO2

A

C20H40 + 30 O2 = 20H2O + 20 CO2

21
Q

In balancing an equation, we can change the _________ to make the number of atoms of each side of the equation balance.

A

coefficient of reactants and products

22
Q

Calcium oxide is used as a drying agent. When water is added, calcium hydroxide is formed. What type of reaction is this?

A

COMBINATION

23
Q

The starting materials in a chemical reaction are known as ___________.

A

REACTANTS

24
Q

What coefficient should be placed when the following equation is balanced? (a) magnesium hydroxide + (b) boric acid —–> (c) salt + (d) water

A

(a) = 3 ; (b) = 2 ; (c) = 1 ; (d) = 6

25
Q

When calcium oxide reacts with bromine gas. What type of reaction is this?

A

SINGLE REPLACEMENT

26
Q

What coefficient should be placed when the following equation is balanced?

Al(OH)3 + H2C2O4 = H2O + Al2(C2O4)3

A

2Al(OH)3 + 3H2C2O4 = 6H2O + Al2(C2O4)3

27
Q

Iron (III) hydroxide reacts with nitric acid. What will be the final product of this reaction?

A

iron (III) nitrate and water

28
Q

A junior high school student found a reaction between zinc chloride and oxygen gas. What type of reaction is this?

A

SYNTHESIS

29
Q

A famous scientist tries to mix a small sample of magnesium carbonate and nitric acid. What will be the final product of this reaction?

A

magnesium nitrate, carbon dioxide and water

GENC MOD (13-15) QUIZ 3 BALANCING EQUATIONS (1 decks)

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