JAMB - Chemistry (2018 - No. 27)
What volume of oxygen will remain after reacting 8cm\(^3\) of hydrogen gas with 20cm\(^3\) of oxygen gas?
10cm\(^3\)
12cm\(^3\)
14cm\(^3\)
16cm\(^3\)
설명
First we need to write the balanced chemical equation:
2H\(_2\) + O\(_2\) → 2H\(_2\)O
Reacting moles: 2 moles : 1 moles 2 moles
Expected reacting Volume: 8 cm\(^3\): 20 cm\(^3\)
Actual reacted Volume: 8 cm\(^3\): 4cm\(^3\) (Based on the balanced equation)
Residual Volume(Expected - Actual): 0cm\(^3\) : 16cm\(^3\)
Therefore, 16cm\(^3\) of Oxygen will remain after reacting 8cm\(^3\) of hydrogen gas with 20cm\(^3\) of oxygen gas.