Really need help with my chemistry!!

Calculate the mass of CO2 injected into the atmosphere when you burn 1L of petrol. Assume petrol can be represented as CH2 (molar mass 14gmol-1) and that its density is 0.8KgL-1. Molar mass of CO2 = 44gmol-1. Remember that mass = density x volume.

Any Help is greatly appreciated!

(1L of petrol) (0.8KgL-1) = 0.8 kilograms of petrol

use molar mass to find moles:
(800 grams petrol) (1 mole CH2 / 14 grams) = 57.14 moles of petrol

by the equation;
1 CH2 & 1.5 O2 --> 1 CO2 & 1 H2O
each mole of CH2 produces an equal numberof moles of CO2
so
57.14 moles of petrol produces 57.14 moles of CO2

using molar mass, Calculate the mass of CO2 :
(57.14 moles of CO2) (44.01 grams Co2 / mol) = 2,515 grams of CO2

I would at least round that off to 2,500 grams of CO2