CNG is an important transportation fuel. When 100g CNG is mixed with 208 oxygen in vehicles, it leads to the formation of CO2 and H2O and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is _______. nearest integerAssume CNG to be methane

Mole CH410016=6.25 + 2O220832=6.5 → CO2 + 2H2O MoleStoi. Coeff.= 6.251 6.52 = 3.25So, O2 is limiting reagentMole - Mole analysisnO22 = nCO216.52=nCO2Mass of CO2 =6.52 x 44 = 143 gm

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CNG is an important transportation fuel. When 100g CNG is mixed with 208 oxygen in vehicles, it leads to the formation of CO₂ and H₂O and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is _______. $[nearest integer]$
$[Assume CNG to be methane]$

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answer is 143.

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Detailed Solution

Mole $\underset{\underset{= 6.25}{\frac{100}{16}}}{{CH}_{4}} + \underset{\underset{= 6.5}{\frac{208}{32}}}{2 O_{2}} \to {CO}_{2} + 2 H_{2} O$

$\frac{Mole}{Stoi . Coeff .} = \frac{6.25}{1} \frac{6.5}{2} = 3.25$

So, O₂ is limiting reagent

Mole - Mole analysis

$\frac{n_{O_{2}}}{2} = \frac{n_{{CO}_{2}}}{1}$

$\frac{6.5}{2} = n_{C O_{2}}$

Mass of CO₂ = $\frac{6.5}{2} x 44 = 143 gm$

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