Show me the steps to solve Knowing the atomic weights of carbon $(=12)$ and oxygen $(=16),$

calculate the amount of CO $2$ produced $($in tonnes$)$ when $1$ tonne of

bituminous coal is combusted given that the coal is composed of $15\%$

moisture, $75\%$ carbon and $10\%$ inert materials. $[$Hint $-$ assume that all

of the carbon in the coal reacts with oxygen to form CO $2]$