Question

10ml hydrogen gas reacts with 5ml of oxygen gas?​

Answer 1

Explanation:

1st Case:

Mass of 10 mL hydrogen at NTP =

22400

2

×10=0.00089g

Mass of 5 mL of oxygen at NTP =

22400

32

×5=0.00714g

Ratio of masses of hydrogen and oxygen =0.00089:0.00714=1:8

2nd Case:

Mass of 200 mt. of hydrogen at NTP = =

22400

2

×200=0.0178g

Mass of oxygen lost by CuO which actually combined with 0.0178 g hydrogen at NTP to form water = 0.144 g Ratio of masses of hydrogen and oxygen = 0.0178 : 0.144 = 1: 8 Hence, law of constant proportions is proved.