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1.
IUPAC Name
Chemical formula
Element or compound
oxygen
O2
element
ammonia
NH3
compound
carbon dioxide
CO2
compound
2.
Compound formula
IUPAC name
NaCl
sodium chloride
CaBr2
calcium bromide
Al2S3
aluminum sulphide
Na2SO4
sodium sulphate
(NH4)2CO3
ammonium carbonate
KClO3
potassium chlorate
Cu3(PO4)2
copper(II) phosphate
3
a) single displacement reaction

b) double displacement reaction

c)  combustion reaction

d)  synthesis reaction
4.
magnesium + hydrochloric acid --> magnesium chloride + hydrogen
5.
a)  2 Na(s)  +  F2(g) ---> 2 NaF(s)

b)  16 Al(s) + 3 S8(s) --->  8 Al2S(s)

c)  7 CO2(g) + 14 H2(g) ---->  C7H14(l)   +  7 H2O(l)
6.
a)   Ca(s)  +  2  H2O(l) ----->  Ca(OH)2(s)  +  H2(g) 

b)   Pb(NO3)2(aq)  +  2 KI(aq)   ----->  PbI2(ppt)  +  2 KNO3(aq)
7.
symbol 1 = Class D: Toxic Materials - Immediate and Severe
symbol 2 = Class B: Flammable and Combustible Materials
symbol 3 = Class F: Dangerously Reactive Materials
symbol 4 = Class C: Oxidizing Materials
8.
a)  A dark red precipitate forms as the contents of flask A are added to the contents of flask B.

b)  317.26 g

c)  The student is trying to test the law of conservation of mass in a chemical reaction.

d)   The total mass of the products could appear to be less than the total mass of reactants if some of the solution in flask A spilled or splattered when it was added to the solution in flask B in part 3.  The product mass could also appear to be less if flask B in part 4 was left open for a period of time before its mass was measured.  In this case, some of the liquid in the flask might evaporate.
9.
Decimal
Scientific
0.010 m
1.0 X 10-2 m
401 mL
4.01 X 102 mL
395.5 g
3.855 X 102 g
10
a)  9/y = 3/2
      y = 9* (2/3)
      y = 18/3
      y = 6
The value of y is 6.

b) % girls = 657/1093 X 100%
    % girls = 60.1%     

c) 7.38 X 107 g/mL