JAMB - Chemistry (2024 - No. 26)
How many moles of CO\(_2\) are produced when ethanol is burnt with 6g of oxygen
0.125
0.250
0.375
0.750
설명
First, write a balanced chemical equation of the reaction:
C\(_2\)H\(_5\)OH + 3 O\(_2\) → 2 CO\(_2\) + 3H\(_2\)O
3moles : 2 moles
Using n = \(\frac{mass}{Molar mass}\), \(\frac{6}{32}\) : x mole
0.1875 mole : x mole
By simple proportion, X = \(\frac{0.1875 X 2}{3}\)
X = 0.125 mole