Your reaction will produce 100 g of carbon dioxide.
Start by writing the balanced chemical equation for the combusiont of methane
Notice that you have a
To determine how many moles of methane react, use the compound's molar mass
The reaction will thus produce
To get the mass of carbon dioxide that would contain this many moles, use the compound's molar mass
Rounded to one sig fig, the number of sig figs you gave for the mass of methane, the naswer will be
First we need an equation...
Methane + oxygen
Work out the Mr of each...
16. 64. 44. 16
So we can now say that if 16g of methane is burnt 44g of carbon dioxide will be produced. If we had 40g methane how much carbon dioxide would be produced?
From then on its a ratios question...
To go from 40 to 16 you divide by 2.5 (40/16=2.5) so to go from 44 to x you need to times by the same number (44x2.5=110)