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..... Chemistry... can anyone help

[From: ] [author: ] [Date: 11-07-08] [Hit: ]
b.c.d.e.f.g.......
When the following reaction is balanced, what is the whole number molecular coefficient on KOH? ____ HCl + ____ KOH ---> ____ H2O + ____ KCl

a. 4
b. 7
c. 9
d. 3
e. 5
f. 1
g. 6
h. 8
i. 2

When the following reaction is balanced, what is the whole number molecular coefficient on CH4? ____ CH4 + ____ Cl2 ---> ____ CH2Cl2 + ____ HCl

a. 6
b. 1
c. 2
d. 5
e. 9
f. 4
g. 3
h. 7
i. 8

When the following reaction is balanced, what is the whole number molecular coefficient on SO2 ? ____ PbS + ____ O2 ---> ____ PbO2 + ____ SO2

a. 9
b. 4
c. 2
d. 1
e. 7
f. 8
g. 5
h. 6
i. 3

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All are 1.

HCl + KOH = KCl + H2O

CH4 + 2 Cl2 = CH2Cl2 + 2 HCl

PbS + 2O2 = PbO2 +SO2

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can u explain how u got 1?... I have similar questions like them and I would like to know how to solve them myself.

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