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Q.
Consider the complete combustion of butane, the amount of butane utilized to produce $72.0\, g$ of water is________ $\times 10^{-1} g$. (in nearest integer)
JEE MainJEE Main 2021Some Basic Concepts of Chemistry
Solution:
$C _{4} H _{10}+\frac{13}{2} O _{2} \rightarrow 4 CO _{2}+5 H _{2} O$
Moles of $H _{2} O =\frac{72}{18}=4$
Moles of $C_{4} H_{10}$ used $=\frac{1}{5} \times 4$
Weight of $C_{4} H_{10}$ used $=\frac{4}{5} \times 58$
$=46.4\, gm$