Balancing these equations:...?

Question

1: The equation from the combustion of hexane is:
C6H14(g) + 19/2O2(g)-(arrow) 6CO2(g) + 7H2O(g)
Calculate the number of moles of
a) CO2 produced in the combustion of 1.50moles of hexane
b) H2O produced in the combustion of 0.25moles of hexane
c) O2 consumed in the combustion of 0.40 moles of hexane

2: Rewrite and balance the following equations:
a) KHCO3(s)-(arrow) K2O3(s) + H2O(g) + CO2(g)

b) NaOH(aq) + H2SO4(s) -(arrow) Na2SO4(aq) + H2O(l)

c) Na(s) + H2SO4(aq) -(arrow) Na2SO4(aq) + H2(g)

d) Hg(l) + O2(g) -(arrow) HgO(s)

e) Fe(s) + Cl2(g)-(arrow) FeCl3(s)

f) Fe2O3(s) + H2(g)-(arrow) Fe(s) + H2O(g)

3: When 10.650g of impure anhydrous potassium carbonate was reacted with excess dilute nitric acid, 3.150g of carbon dioxide was produced.
K2CO3(s) + 2HNO3(aq)-(arrow) 2KNO3(aq) + H2O(l)+CO2(g)
Calculate:
a) moles of potassium carbonate in the impure sample
b) percentage purity of the potassium carbonate sample

Thanks for helping me. Please show working.

Answer 1

1a) 1.5 x 6 = 9 moles of CO2
1b) 0.25 x 7 = 1.75 moles of H2O
1c) 0.4 x 9.5 = 3.8 moles of O2

2a) 2 KHCO3 -> K2O3 + H2O + CO2
2b) 2 NaOH + H2SO4 -> Na2SO4 + 2 H2O
2c) 2 Na + H2SO4 -> Na2SO4 + H2
2d) 2 Hg + O2 -> 2 HgO
2e) 2 Fe + 3 Cl2 -> 2 FeCl3
2f) Fe2O3 + 3 H2 -> 2 Fe + 3 H2O

3) I don't know what you mean. Like percent yeild? I don't know

Answer 2

This wont be of much use to you, but I suggest you only ask how to do one problem and learn how to do the rest from there. You're not going to learn anything by having us do it for you. This is obviously for your homework.

Anyway.... good luck. Hope ya change your mind and do it yourself.