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Chemistry

From the equation for burning of hydrogen and oxygen

2H2 + O2 ⟶ 2H2O (Steam)

Write down the number of mole (or moles) of steam obtained from 0.5 moles of oxygen.

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Answer

2H2+O2⟶2H2O2 mole1 mole2 mole\begin{matrix} 2\text{H}2 & + &\text{O}2 & \longrightarrow & 2\text{H}_2\text{O} \ 2\text{ mole} & & 1\text{ mole}& & 2\text{ mole} \end{matrix}

1 mole of oxygen gives 2 moles of steam

∴ 0.5 mole of oxygen will give 21\dfrac{2}{1} × 0.5

= 1 mole of steam

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