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Chemistry > Unit 7 Test > Flashcards

Unit 7 Test Flashcards

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1
Q

What are the 5 types of chemical reactions

A

Synthesis
Decomposition
single-replacement reaction
double-replacement reaction
combustion

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2
Q

solution

A

aqaeus

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3
Q

Determine the empirical and molecular formulas for each compound.
Caffeine is composed of 49.45%C, 5.15% H, 28.9% N, and 16.5% O. Caffeine has a molar mas of 194 g/mol. Determine the molecular formula for Caffeine.

A

C4H5N2O
C8H10N4O2

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4
Q

Whats the percent composition of sodium chloride

A

39% Na
61% Cl

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5
Q

Whats the percent composition of potassium sulfate

A

45% K
18% S
37% O

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6
Q

Whats Avagadro’s number/Mole

A

6.02x10^23

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7
Q

Find the molar mass of AgNO3

A

169.88

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8
Q

What is STP

A

Standard temperature pressure (0 degrees)

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9
Q

Which one is an empirical formula and which is a molecular formula
C3H9O3
CH3O

A

Molecular
Empirical

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10
Q

Which is a coefficient and which is a subscript
3CO
CO2

A

Coefficient
Subscript

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11
Q

Balance this equation
Fe+H2SO4——-Fe2(SO4)3+H2

A

2Fe+3H2SO4———Fe2(SO4)3+3H2

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12
Q

magnesium+nitric acid———-magnesium nitrate+hydrogen
Balance and determine type of reaction

A

Mg+2HNO3——–Mg(NO3)2+H2
single-replacement

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13
Q

2Al+Fe2O3———Al2O3+2Fe

A

single-replacement

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14
Q

2NaCl+H2So4—–Na2So4+2HCl

A

double-replacement reaction

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15
Q

C5H12+8O2——-5CO2+6H2O

A

combustion

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16
Q

2NaNO3——–2NaNO2+O2

A

decomposition

17
Q

2NH3+H2SO4——-(NH4)2SO4

A

synthesis

18
Q

What is conserved in a chemical reaction

A

Atoms and mass

19
Q
  1. Silver nitrate is made to react with iron(III) chloride in a double replacement reaction.
    a. Write a balanced chemical equation
    b. What product forms a precipitate?
    c. If 18.0 g of silver nitrate reacts with 32.4 g of iron (III) chloride, which reactant is the limiting reactant?
    d. How many grams of excess reagent are left over after the reaction?
    e. How many grams of precipitate can theoretically be produced in this reaction?
    f. If 13.8 g of silver chloride are actually produced in the laboratory, what is the percent yield?
A

a. 3AgNO3+FeCl3——–3AgCl+Fe(NO3)3
b. 3AgCl
c. AgNO3
d. 26.67 g FeCl3
e. 15.19 g
f. 91%

Chemistry (17 decks)

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