Chemistry Applying Mole Concept Combustion Questions in Mobile Legends

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See how H2 Chemistry Mole Concept Combustion Questions can be applied in games:

Question

In order to develop a new skill, Valir sparked 20 cm³of a gaseous hydrocarbon with 150 cm³ of oxygen and the residual gases cooled to room temperature, a contraction of 60 cm³ occurred. A further contraction of 80cm³ took place when the residual gases were subjected to aqueous NaOH. Find formula of the hydrocarbon Valir used. [All gaseous volumes are measured under identical conditions.]

Solution

C_xH_y + (x + $\frac{y}{4})$ O₂ $\rightarrow$ CO₂ + H₂O

V(CO₂) _produced = 80 cm³ since it is removed by alkaline NaOH.

$\frac{V(CO_2)}{V(C_xH_y)} = \frac{80}{20} = \frac{x}{1} \Rightarrow x = 4$

Total initial volume before combustion = 150 + 20 = 170 cm³

Since a contraction of 60cm³ occurred after ignition and cooling, contraction = total initial volume – total final volume

V(O₂) _excess + V(CO₂) = 170 – 60 = 110 cm³.

V(O₂) _excess = 110 – 80 = 30 cm³

V(O₂) _reacted = 150 – 30 = 120 cm³

$\frac{V(O_2)_{reacted}}{V(C_xH_y)} = \frac{120}{20} = \frac{x+\frac{y}{4}}{1} = \frac{4+\frac{y}{4}}{1} \Rightarrow$ y = 8

The molecular formula used by Valir is C₄H₈.

🔥 Applying Mole Concept Combustion Questions in Mobile Legends | Ingel Soong

Chemistry Applying Mole Concept Combustion Questions in Mobile Legends

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