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CHM 111 Worksheet: Molecules, Compounds, and Chemical Equations, Lecture notes of Chemistry

A worksheet from nvcc al campus chm 111 course, covering chapter 3 topics such as molecules, compounds, and chemical equations. It includes exercises on completing tables, balancing chemical equations, and calculating percent compositions.

Typology: Lecture notes

2021/2022

Uploaded on 09/12/2022

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NVCC AL Campus CHM 111 Worksheet
Chapter 3: Molecules, Compounds and Chemical Equations Name____________________________
Q1. Complete the following table
Formula
Name
Name
Formula
CuO
copper (II) oxide
hydrocyanic acid
HCN
NH4OH
barium carbonate
Pb(NO3)2
Potassium acetate
HNO2 (aq)
nitrous acid
Lithium hydride
LiH
Na2SO3
potassium hydrogenphosphae
P4O10
Carbon monoxide
Mg(ClO3) 2
Sodium nitride
Li3P
lithium phosphide
Magnesium sulfide
N2O4
Nickel (II) chloride
FeCO3
Lead (II) chloride
PbCl2
Ag2SO4
Aluminum sulfate
CCl4
carbon tetrachloride
Sulfur tetrafluoride
SO3
Silver sulfide
HClO4(aq)
Potassium dichromate
NH4Br
Lithium carbonate
Li2CO3
Ca(OH)2
calcium hydroxide
Carbon disulfide
NO2
Nitrogen trichloride
CO2
Phosphoric acid
HF(aq)
Acetic acid
HC2H3O2
pf3

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Chapter 3: Molecules, Compounds and Chemical Equations Name____________________________

Q1. Complete the following table

Formula Name Name Formula

CuO copper (II) oxide hydrocyanic acid HCN

NH 4 OH (^) barium carbonate

Pb(NO 3 ) 2 Potassium acetate

HNO 2 (aq) nitrous acid Lithium hydride LiH

Na 2 SO 3 potassium hydrogenphosphae

P 4 O (^10) Carbon monoxide

Mg(ClO 3 ) 2 Sodium nitride

Li 3 P (^) lithium phosphide Magnesium sulfide

N 2 O 4 Nickel (II) chloride

FeCO 3 Lead (II) chloride (^) PbCl 2

Ag 2 SO (^4) Aluminum sulfate

CCl (^4) carbon tetrachloride Sulfur tetrafluoride

SO 3 Silver sulfide

HClO 4 (aq) Potassium dichromate

NH 4 Br Lithium carbonate (^) Li 2 CO 3

Ca(OH) (^2) calcium hydroxide Carbon disulfide

NO 2 Nitrogen trichloride

CO 2 Phosphoric acid

HF(aq) Acetic acid (^) HC 2 H 3 O 2

Q2. Balance the following Chemical Equations:

(A) _____ CaC 2 (s) + _____H 2 O( l ) โ†’ _____ Ca(OH) 2 (aq) + _____ C 2 H 2 (g)

(B) _____ P 4 O 10 + _____ H 2 Oโ†’ ______ H 3 PO 4

(C) 2 C 3 H 8 O 3 + 7 O 2 โ†’ 6 CO 2 + 8 H 2 O

or ___ C 3 H 8 O 3 + 7/2_ O 2 โ†’ 3 CO 2 + 4 H 2 O

(D) _____ C 4 H 10 ( l ) + _____ O 2 (g) โ†’ _____ CO 2 (g) + _____ H 2 O(g)

(E) ___ Al + ___ N 2 โ†’ ___ Al 2 N 3

(F) 4_ NaN 3 โ†’ 2 Na + 3 N 2

(G) ___ C 3 H 5 N 3 O 9 โ†’ ___ CO 2 + ___ N 2 + ___ H 2 O + ___ O 2

Q3. Write balanced equations for the following chemical reactions

a. Solid mercury (II) nitrate on heating decomposes to form mercury (II) oxide, Oxygen gas and nitrogen dioxide gas.

2 Hg(NO 3 ) 2 (s) ๏ƒ  2 HgO (s) + O 2 (g) + 4 NO 2 (g)

b. Dihydrogen monosulfide gas reacts with iron (III) hydroxide to form solid iron (III) sulfide and water.

c. Copper metal reacts with hot nitric acid to form copper (II) nitrate, nitrogen dioxide gas and water.

d. Solid calcium hydroxide reacts with hydrochloric acid to form aqueous calcium chloride and water.

Ca(OH) 2 (s) + 2 HCl (aq) ๏ƒ  CaCl 2 (aq) + 2 H 2 O (l)

e. Solid iron reacts with Oxygen gas to form solid Iron (II) oxide

f. Butane gas (C 5 H 12 ) reacts with Oxygen gas to form Carbon dioxide gas and water

Q4. Calculate the percent composition of each element in Al(NO 3 ) 3

Al: 12.67% N: 19.73% O: 67.60%