(Q&A) Gr. 11 - Questions about electronegativity, combustion?

Q:-
1. Based on general electronegativity trends, which bond is more polar? B-Cl or N-Cl?

2. Write the balanced equation for the complete combustion of cyclopropane.

Is it something like this?
C3H6 + O2 -->
How do I know what it will yield?

A:-
1. Electronegativity values (approximate):
B: 2.0
N: 3.0
Cl: 3.1

The B-Cl bond is more polar.

2. Yes, the reactants are C3H6 and O2. The products of complete combustion of a hydrocarbon are always CO2 and H2O, so write the unbalanced equation,

C3H6(g) + O2(g) -----> CO2(g) + H2O(g)

and then balance it.