Question 1

What is the correct formula for iron (III) phosphate?

Accepted Answer

FePO4

Answer

Fe3P2

Answer

FeP

Answer

Fe3(PO4)2

Question 2

The bond between Br atoms in a Br2 molecule is...

Accepted Answer

covalent and is formed by the sharing of two valence electrons

Answer

covalent and is formed by the transfer of two valence electrons

Answer

ionic and is formed by the sharing of two valence electrons

Answer

ionic and is formed by the transfer of two valence electrons

Question 3

The gram-formula mass of H2O is 18 grams/mole. How was this determined?

Accepted Answer

The atomic mass of H is 1, and of O is 16. So 2 x(1) + 16 = 18

Answer

H2O is a liquid at 18 degrees, so it's 18.

Answer

Actually it's 17 grams/mole!

Answer

H2O has 3 ions, and three times 6 = 18.

Question 4

Which change occurs when a barium atom loses two electrons?

Accepted Answer

It becomes a positive ion and its radius decreases.

Answer

It becomes a positive ion and its radius increases.

Answer

It becomes a negative ion and its radius increases.

Answer

It becomes a negative ion and its radius decreases.

Question 5

Which substance is an ionic compound?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 6

How many electrons are contained in an Au3+ ion?

Accepted Answer

76

Answer

79

Answer

82

Answer

197

Question 7

Which electrons are represented by all of the dots in the diagram shown?

Accepted Answer

the carbon and hydrogen valence electrons

Answer

all of the carbon and hydrogen electrons

Answer

the carbon valence electrons, only

Answer

the hydrogen valence electrons, only

Question 8

Which compound contains both ionic and covalent bonds?

Accepted Answer

CaCO3

Answer

CH2O

Answer

PCl3

Answer

MgF2

Question 9

A substance that does not conduct electricity as a solid, but does conduct electricity when melted is most likely classified as…

Accepted Answer

ionic

Answer

molecular

Answer

metal

Answer

nonmetal

Question 10

An unknown element X can form a compound with the formula XBr3. In which group on the Periodic Table would element X be found?

Accepted Answer

group 13

Answer

group 18

Answer

group 15

Answer

group 1

Question 11

Which equation shows a conservation of mass?

Accepted Answer

PCl5  --> PCl3 + Cl2

Answer

Al + Br2  --> AlBr3

Answer

Na + Cl2  --> NaCl

Answer

H2O  -->  H2 + O2

Question 12

Which substance has a chemical formula with the same ratio of metal ions to nonmetal ions as in potassium sulfide?

Accepted Answer

sodium oxide

Answer

magnesium oxide

Answer

sodium chloride

Answer

magnesium chloride

Question 13

What is the total number of moles in 80.0 grams of C2H5Cl  (that's chlorine at the end of the formula)

Accepted Answer

1.24 moles

Answer

0.81 moles

Answer

1.00 moles

Answer

2.00 moles

Question 14

What property is NOT associated with covalent compounds?

Accepted Answer

brittle

Answer

low melting point

Answer

soft

Answer

poor conductor when dissolved in water

Question 15

2H2 + O2 --> 2H2O    If you use 8 grams of hydrogen to produce 72 grams of H2O, how much O2 is needed?

Accepted Answer

64 g O2

Answer

16 g O2

Answer

80 g O2

Answer

56 g O2

Question 16

If you are asked to draw a Lewis dot diagram of CaO, what will the final diagram involve?

Accepted Answer

dots (e-), brackets, charges

Answer

bond lines & dots (e-)

Answer

brackets & dots (e-)

Answer

dots (e-), brackets, bond lines

Question 17

A green powder is dissolved in water, and when an electric current is applied, the current travels through the water. This powder is most likely...

Accepted Answer

an ionic compound

Answer

a noble gas

Answer

a metal

Answer

a covalent compound

Question 18

When a bond is formed...

Accepted Answer

... energy is released

Answer

... energy is absorbed

Answer

... energy is created

Answer

... energy is destroyed

Question 19

Which of these compounds has a double bond?

Accepted Answer

O2

Answer

Br2

Answer

N2

Answer

H2

Question 20

When this reaction is balanced, what coefficient goes in front of the CuO ?

Accepted Answer

2

Answer

3

Answer

1

Answer

0

Question 21

What ionic formula will break into 4 ions when dissolved in water?

Accepted Answer

K3(PO4)

Answer

Al2O3

Answer

NaCl

Answer

CH3OH

Question 22

Which answer contains ONLY diatomic elements?

Accepted Answer

hydrogen, fluorine, nitrogen

Answer

bromine, helium, oxygen

Answer

helium, hydrogen, oxygen

Answer

sodium, fluorine, nitrogen

Question 23

Which is the correct Bohr diagram for a carbon atom?

Accepted Answer

B

Answer

C

Answer

A

Question 24

The gram-formula mass of CO2 is 48 g/mol. So this means one mole of CO2 has a mass of...

Accepted Answer

48 grams

Answer

12 grams

Answer

28 grams

Answer

4800 grams

Question 25

How do you know that this reaction is balanced? (Choose the best answer)

Accepted Answer

There are the same number of each type of element on both sides of the reaction.

Answer

There are liquids, solids and aqueous solutions.

Answer

The are 2 hydrogens on each side of the reaction.

Answer

The number of atoms is equal on both sides.

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