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Chapter 3 Homework

front 1

The cation of H3PO4 (acid) (H 3 P O 4 (acid) ) is:

back 1

H3 + (OR H3 1+)

WRONG

front 2

The cation of CrO is:

back 2

Cr2 + (OR Cr2 1+)

WRONG

front 3

The anion of FeI2 (OR F e I 2 ) is:

back 3

I2 - (OR I2 1 minus)

WRONG

front 4

The anion of BeI2 (OR B e I 2 ) is:

back 4

I2 - (OR I2 1 minus)

WRONG

front 5

The cation of Sn3N2 is:

back 5

Sn3 2+

WRONG

front 6

The cation of HClO2(acid) (OR HC l O2 (acid)) is:

back 6

H+

front 7

The anion of NaCl (OR N a Cl) is:

back 7

Cl- (OR Cl minus)

front 8

The cation of Na2SO3 (N a2 S O3 ) is:

back 8

Na2 + OR (N a2 1+)

WRONG

front 9

The cation of HI (acid) (OR H I (acid)) is:

back 9

H+

front 10

The anion of Pb(OH)2 (OR Pb left parenthesis OH right parenthesis 2) is:

back 10

(OH)2 - (OR left parenthesis OH right parenthesis 2 1 minus)

WRONG

front 11

The anion of PbCl4 is:

back 11

Cl4 - (OR Cl4 1 minus)

WRONG

front 12

The anion of HClO4 (acid) (OR H C l O4 (acid) ) is:

back 12

ClO4 - (OR C l O4 1 minus)

front 13

The cation of HF(acid) is:

back 13

H+

front 14

The anion of CuF (OR C u F) is:

back 14

F- (OR F minus)

front 15

The anion of HCl (acid) (OR H Cl (acid)) is:

back 15

Cl- (OR Cl minus)

front 16

The anion for Cu(CN)2 (OR C u left parenthesis CN right parenthesis 2 ) is:

back 16

CN2 - (OR CN2 1 minus)

WRONG

front 17

The cation of Mg(OH)2 (OR Mg right parenthesis OH left parenthesis 2) is:

back 17

Mg2+

front 18

The cation of NH4HSO4 (OR N H4 H S O4) is:

back 18

NH4 + (OR NH4 1+)

front 19

The anion of CrO (OR C r O) is:

back 19

O2- (OR O 2 minus)

front 20

The anion of Li2O (OR L i 2 O) is:

back 20

O2- (OR O 2 minus)

front 21

What is the molecular weight of Magnesium fluoride, MgF2 (OR Mg F2). Report your answer to two decimal places.

Do not include units with your answer.

The atomic weight of M g is 24.31 grams/mole

The atomic weight of F is 19.00 grams/mole

back 21

62.31

front 22

What is the molecular weight of glucose, C6H12O6 (OR C6 H12 O6). Report your answer to two decimal places.

Do not include units with your answer.

The atomic weight of H is 1.01 grams/mole

The atomic weight of O is 16.00 grams/mole

The atomic weight of C is 12.01 grams/mole

back 22

180.18

front 23

Convert (3.078x10^24) molecules of acetic acid, HC2H3O2 (OR "H" C2 H3 O2) to grams of acetic acid. Avogadro's Number is 6.022x1023.

You must enter your answer in scientific notation. For example, 25 would be expressed as 2.5x10^1.

Note: Your answer is assumed to be reduced to the highest power possible.

back 23

3.070 x 102

front 24

Convert 151.0 grams of oxygen gas, O2, to liters at STP.

1 mole of gas at STP is 22.414 Liters

back 24

105.8

front 25

Convert (2.92x10^24) molecules of glucose, C6H12O6 (OR C6 H12 O6) to grams of glucose. Avogadro's number is 6.022x1023.

You must enter your answer in scientific notation. For example, 25 would be expressed as 2.5x10^1.

Note: Your answer is assumed to be reduced to the highest power possible.

back 25

8.74 x 102

front 26

Convert 97.0 liters of chlorine gas, Cl2, to grams at STP.

1 mole of gas at STP is 22.414 Liters

back 26

307

front 27

How many molecules are there in 2.5 mole of NaCl (OR "N" a C l)?

Express your answer in scientific notation using E to represent scientific notation. For example, 6.022x10^23 would be represented as 6.022E23.

Round your answers to the proper number of significant figures and do not include units with you answer.

back 27

1.5E24

front 28

What is the percent of water in N a2C O3 dot 2H2O?
% H2O (MW = 18.02 g H2O) = ______%

back 28

25.36

front 29

A hydrocarbon has a MW of 114 g/mol and has a composition of carbon 84.06% and hydrogen 15.94%. What is its (a) empirical formula (b) true formula?

back 29