A mixture of hydrogen and oxygen at one bar pressure contains 20%, by weight, of hydrogen. The parti — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Let total mass be 100 g. Mass of $H_2$ = 20 g (10 mol) [10]. Mass of $O_2$ = 80 g (2.5 mol) [10]. Total moles = 12.5 mol [10]. Mole fraction of $H_2$ = 10 / 12.5 = 0.8 [10]. Partial pressure of $H_2$ = 0.8 * 1 bar = 0.8 bar [10].