Name:_____KEY________________________
Period:__________
Chemistry Formula Review
Name the following Polyatomic Ions.
1) C2H3O2- = _Acetate_____
2) NO2- = ___Nitrite__________
3) SO4-2 = ____Sulfate________
4) CO3-2 = ____Carbonate__________
5) NH4+ = _____Ammonium__________
6) MnO4- = ___Permanganate_________
Give the formula and Charge for the following
polyatomic ions:
7) Cyanide: ____CN-______________
8) Ammonium: ____NH4+_______________
9) Nitrate: ______NO3-________________
10) Hydroxide: ___OH-________________
11) Phosphate: ___PO4-2________________
12) Sulfite: ______SO3-2_______________
Name the following compounds AND give the
molar mass of each compound:
Find the Chemical Formula for each compound
AND the oxidation state for each element:”
13) NaF __Sodium Floride_____41.99___
14) NF3 __Nitrogen Trifloride___71.00____
15) Li2O __Lithium Oxide____29.88__
16) Al2S3 ____Aluminum Sulfide___150.16__
17) MgSO4 ____Magnesium Sulfate_120. 37_
18) SiH4 _____Silicon Tetrahydride__32.12_
19) KNO3 __Potassium NItrate___101.10__
20) P2O5 ___Diphosphorus Pentoxide__141.95_
21) Ca(OH)2 ____Calcium Hydroxide_74.09___
22) sodium nitrate Na2NO3 Na, +1; N, +5; O, -2
23) zinc oxide _ZnO___ Zn, +2: O, -2_
24) water ___H2O___ H, +1; O, -2
25) calcium hydride __CaH2 H, -1; Ca, +2
26) carbon dioxide _CO2__ C, +4; O, -2___
27) nitrogen __N2___ N, 0_______
28) sodium sulfate _Na2SO4 Na, +1; S, +6; O, -2
29) aluminum hydroxide Al(OH)3_Al, +3; H, +1;
O, -2
30) magnesium phosphate _Mg3(PO3)2__ Mg,
+2; P, +5; O, -2
Given mass, convert to number of moles:
31)
30 grams of H3PO4
33)
110 grams of NaHCO3
0.31 moles
1.31 moles
32)
34)
25 grams of HF
1.1 grams of FeCl3
1.25 moles
0.0068 moles
Given number of moles, convert to grams:
34)
4 moles of Cu(CN)2
35)
462 grams
436.8 grams
5.6 moles of C6H6
Name:_____KEY________________________
36)
21.3 moles of BaCO3
37)
Period:__________
1.2 moles of (NH4)3PO3
4202.5 grams
159.6 grams
Find the percent composition of each element:
38) ammonium sulfite
% N _24.1_
% H _6.9__
% S _27.6_
% O _41.3__
40) aluminum acetate % Al _13.2_
% C _35.3_
% H _4.4__
% O _47.1__
39) copper (II) hydroxide
41) sodium bromide
% Cu _65.1_
% O _32.8_
% H _2.1 _
% Na _22.4__
% Br _77.6_
Answer the following questions:
42) What’s the empirical formula of a molecule
containing 65.5% carbon, 5.5% hydrogen, and
29.0% oxygen?
44) What’s the empirical formula of a molecule
containing 18.7% lithium, 16.3% carbon, and
65.0% oxygen?
C3H3O
Li2CO3
43) If the molar mass of the compound in
problem 42 is 110 grams/mole, what’s the
molecular formula?
45) If the molar mass of the compound in
problem 44 is 73.8 grams/mole, what’s the
molecular formula?
Li2CO3 (In this case, the molecular and
empirical formulas are the same, a frequent
occurrence for inorganic compounds)
C6H6O2
46) 200.00 grams of an organic compound is known to contain 83.884 grams of carbon, 10.486 grams of
hydrogen, 18.640 grams of oxygen and the rest is nitrogen. What is the empirical formula of the
compound?
C: 83.884g ÷ 12.011 = 6.98 mol
C: 6.98/1.17 = 6
H: 10.486g ÷ 1.0079 = 10.40 mol
O: 18.640g ÷ 15.9994 = 1.17 mol
N: 86.99g ÷ 14.007 = 6.21 mol
H: 10.40/1.17 = 9
O: 1.17/1.17 = 1
N: 6.21/1.17 = 5.4
In order to make it the smallest
whole number ratio they must all
be multiplied by 5 to get:
C30H45O5N27