SI #6

1. GENERAL CHEMISTRY-I (1411)
S.I. # 6
1. Balance the following equations:
a. CO(g) + ____ O2 (g)  _____ CO2
b. __ N2O5 (g) + ____ H2O (l)  _____ HNO3 (aq)
c. __ CH4 (g) + ____ Cl2 (g)  _____ CCl4 (l) + _____ HCl (g)
d. __ Al4C3 (s) + ______ H2O (l)  _____ Al(OH)3 (s) + _____ CH4 (g)
e. __ C5H10O2 (l) + ______ O2 (g)  _______ CO2(g) + _______ H2O (l)
f. __ Fe(OH)3 (s) + ____ H2SO4(aq)  _____ Fe2(SO4)3 (aq) + ____ H2O (l)
g. __ Mg3N2 (s) + ___H2SO4 (aq) ____ MgSO4 (aq) + _____ (NH4)2SO4 (aq)
2. What kind of reactions are the following?
a. HF + NaOH  H2O + NaF ________________________
b. C9H5 + O2  H2O + CO2 ________________________
c. K
+
+ S
2-
 K2S ________________________
d. CH3OH + O2  H2O + CO2 ________________________
e. H2O + NH3  HNO3 ________________________
f. HCl + Mg  H2 + MgCl2 ________________________
g. CuSO4  CuSO3 + O2 ________________________
h. H2S + LiOH  Li2S + H2O ________________________
i. H3PO4 + Ca  Ca3(PO4)2 + H2 ________________________
3. Calculate the percent by mass of Oxygen in the following compounds:
a. SO3
b. CH3COOCH 3
c. Cr(NO3)3
d. sodium sulfate
e. ammonium nitrate

2. 4. Calculate the following quantities:
a. mass, in grams, of 1.906x10
-2
mol BaI2
b. number of moles of NH4Cl in 48.3g
c. number of molecules in 0.05752 mol HCHO2
d. number of O atoms in 4.88x10
-3
mol Al(NO3)3
5. Determine the empirical formula of each of the following compounds if a sample
contains:
a. 0.104 mol K, 0.052 mol C, and 0.156 mol O
b. 5.28 g Sn and 3.37 g F
c. 87.5%N and 12.5%H by mass