Quiz about Honors Chem Final

Question 1

How many electrons should Oxygen have around its Lewis dot model?

Accepted Answer

6

Answer

5

Answer

7

Answer

8

Question 2

Three pairs of electrons are shared in a

Accepted Answer

Triple bond

Answer

Single bond

Answer

Double bond

Question 3

tetra

Accepted Answer

Four

Answer

six

Answer

Five

Answer

seven

Question 4

Which of the following is the correct Lewis structure for the compound PBr₃?

Accepted Answer

structure D

Answer

structure A

Answer

structure B

Answer

structure C

Question 5

In CO₂, how many UNSHARED pairs of electrons does each oxygen have?

Accepted Answer

2

Answer

1

Answer

4

Answer

6

Question 6

How strongly an atom attracts electrons is called....................

Accepted Answer

Electronegativity

Answer

Ionization energy

Answer

Electricity

Answer

Nuclear force

Question 7

How did Mendeleev arrange the elements?

Accepted Answer

atomic mass

Answer

alphabetical

Answer

density

Answer

melting point

Question 8

The horizontal row on the periodic table is called a

Accepted Answer

period

Answer

group

Answer

family

Answer

atomic number

Question 9

A vertical column is called...

Accepted Answer

group

Answer

tower

Answer

period

Answer

crew

Question 10

The number at the bottom of each square on the periodic table is the ...

Accepted Answer

atomic mass

Answer

atomic number

Answer

chemical symbol

Answer

element name

Question 11

The number at the top of each square on the periodic table is the ...

Accepted Answer

atomic number

Answer

atomic mass

Answer

Chemical Symbol

Answer

Element Name

Question 12

What is the chemical symbol for Lithium?

Accepted Answer

Li

Answer

H

Answer

He

Answer

N

Question 13

Elements which are shiny, conduct electricity and heat are called

Accepted Answer

metal

Answer

nonmetal

Answer

metalloid

Answer

nonexistent

Question 14

The atoms along the staircase are called

Accepted Answer

metalloids

Answer

metals

Answer

nonmetals

Answer

noble gases

Question 15

Which is a halogen?

Accepted Answer

Chlorine

Answer

Helium

Answer

Oxygen

Answer

Neptune

Question 16

Which is an alkali metal?

Accepted Answer

Sodium

Answer

Magnesium

Answer

Iron

Answer

Europium

Question 17

Elements in a ..................have similar chemical properties.

Accepted Answer

group

Answer

period

Answer

row

Question 18

ammonium chloride

Accepted Answer

NH4Cl

Answer

NH3Cl2

Answer

NH₄ClO₃

Answer

NH4Cl2

Question 19

calcium phosphate

Accepted Answer

Ca₃(PO₄)₂

Answer

CaPO4

Answer

Ca₂(PO₄)₃

Answer

Ca3PO4

Question 20

phosphorus trichloride

Accepted Answer

PCl3

Answer

KCl3

Answer

K3Cl

Answer

P3Cl

Question 21

barium hydroxide

Accepted Answer

Ba(OH)2

Answer

Ba2OH

Answer

BaOH

Answer

Ba2OH

Question 22

CaCO3

Accepted Answer

calcium carbonate

Answer

calcium monocarbon trioxide

Answer

calcium carbide

Answer

calcium carbonite

Question 23

AlBr3

Accepted Answer

aluminum bromide

Answer

aluminum tribromide

Answer

aluminum bromine

Answer

monoaluminum tribromide

Question 24

K2SO3

Accepted Answer

potassium sulfite

Answer

potassium sulfide

Answer

potassium sulfate

Answer

dipotassium monosulfur trioxide

Question 25

SiCl4

Accepted Answer

silicon tetrachloride

Answer

silicon quadchloride

Answer

monosilicon tetrachloride

Answer

silicon chloride

Question 26

Carbon dioxide

Accepted Answer

CO2

Answer

C2O2

Answer

C20

Answer

CO

Question 27

Bromine monoflouride

Accepted Answer

BrF

Answer

Br1F1

Answer

Br2F

Answer

BrF2

Question 28

Which of the following models best demonstrates a balanced chemical equation?

Accepted Answer

F

Answer

G

Answer

H

Answer

J

Question 29

Which of these formulas contain equal numbers of nitrogen atoms?

Accepted Answer

Formulas I, II, and V

Answer

Formulas I and III

Answer

Formulas I and IV

Answer

Formulas II and III

Question 30

All of the following reactions are correctly balanced except-

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 31

4Si + S₈ --> 2Si₂S₄

Accepted Answer

Synthesis

Answer

Decomposition

Answer

Single displacement

Answer

Double displacement

Question 32

3Ca + 2AlCl₃ --> 3CaCl₂+2Al

Accepted Answer

Single diplacement

Answer

Synthesis

Answer

Decomposition

Answer

Double displacement

Question 33

3KOH + H₃PO₄ --> K₃PO₄+3H₂O

Accepted Answer

Double displacement

Answer

Synthesis

Answer

Decomposition

Answer

Single displacement

Question 34

2Pb(NO₃)₂ --> 2PbO + 4NO₂ + O₂

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single displacement

Answer

Combustion

Question 35

What type of chemical reaction is this one?
C₂H₂ + O₂ --> CO₂ + H₂O

Accepted Answer

Combustion

Answer

Decomposition

Answer

Synthesis

Answer

Single Replacement

Question 36

What is the small number that you CANNOT CHANGE in a chemical equation?

Accepted Answer

Subscript

Answer

Coefficient

Answer

Product

Answer

Reactant

Question 37

What is the "large" number that you CAN CHANGE in a chemical equation?

Accepted Answer

Coefficient

Answer

Subscript

Answer

Product

Answer

Reactant

Question 38

Predict the products (right side) of this reaction reaction,
Ca + 2HCl --> ?

Accepted Answer

CaCl₂ + H₂

Answer

4CaCl₃+ H₂

Answer

no reaction

Answer

CaH₂ + Cl

Question 39

Balance this equation
Ca + H₂O --> CaO + H₂

Accepted Answer

It is already balanced

Answer

Ca + 2H₂O --> CaO + 2H₂

Answer

2Ca + H₂O --> CaO + H₂

Answer

Cannot be balanced

Question 40

Which coefficients balance this equation:
_Na + _Cl₂---> _NaCl

Accepted Answer

2,1,2

Answer

2,1,1

Answer

2,2,1

Answer

1,2,2

Question 41

Balance this equation.
_CH₄ + _O₂--> _CO₂+ _H₂O

Accepted Answer

1,2,1,2

Answer

1,2,1,1

Answer

2,1,2,1

Answer

0,2,0,2

Question 42

How many grams are in 7.8 moles of NaCl?

Accepted Answer

452 grams

Answer

476grams

Answer

460 grams

Answer

462 grams

Question 43

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements. (keep two decimal places throughout calculations)

Accepted Answer

SO3

Answer

SO

Answer

SO2

Answer

SO4

Question 44

What is the empirical formula of the following molecular formula: C₃H₆

Accepted Answer

CH2

Answer

C3H6

Answer

C2H4

Answer

CH3

Question 45

What is the molecular formula if the empirical formula is C₂H₅ and the molecular molar mass is 58.14 g/mol?

Accepted Answer

C₄H₁₀

Answer

C2H5

Answer

C1H2.5

Answer

C4H8

Question 46

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

Accepted Answer

C₆H₁₂O₆

Answer

CH2O

Answer

C₂H₄O₂

Answer

C₄H₈O₄

Question 47

What is the percent by mass of magnesium in MgO?

Accepted Answer

60%

Answer

20%

Answer

40%

Answer

50%

Question 48

What is the percent by mass of sodium in NaCl?

Accepted Answer

39%

Answer

61%

Answer

35%

Answer

65%

Question 49

What is the percent by mass of chlorine in NaCl?

Accepted Answer

61%

Answer

39%

Answer

35%

Answer

65%

Question 50

P₄+ 3O₂--> P₄O₆
What is the limiting reactant is 12 moles of P₄react with 15 moles of O₂?

Accepted Answer

O2

Answer

P4

Answer

P4O6

Answer

none of the above

Question 51

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

Accepted Answer

85%

Answer

1.16%

Answer

116%

Answer

76%

Question 52

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

Accepted Answer

theoretical yield

Answer

mole ratio

Answer

actual yield

Answer

percentage yield

Question 53

Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?

Accepted Answer

Fe

Answer

S

Answer

FeS

Answer

none

Question 54

P₄+ 6Cl₂--> 4PCl₃The reaction of 75.0g P₄ with excess chlorine gas produces 110g PCl₃in lab. Find the theoretical yield and calculate percent yield for the reaction.

Accepted Answer

33%

Answer

78%

Answer

64%

Answer

27%

Question 55

2. True or False?
A chemical reaction stops before the limiting reagent is used up.

Accepted Answer

False

Answer

True

Question 56

What are the spectator ions in the reaction of sodium chloride with silver nitrate?

Accepted Answer

sodium and nitrate

Answer

silver and nitrate

Answer

sodium and chloride

Answer

silver and chloride

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