Question

200cm³ of hydrogen and 150cm³ of oxygen are mixed and ignited as per the follow reaction :-
2H2 + O2 ------> 2H2O
What volume of oxygen remains unreacted ? ​

Answer 1

$\huge\mathrm{Answer :-}$

2 H2 + O2 ➡ 2 H2O

2 vols 1 vol 2 vols

If 2 vols of hydrogen require 1 vol of oxygen

If 1 vol of hydrogen require 1 /2 vol of oxygen

Therefore ,200cm³ of hydrogen will require -

- 1 / 2 ×200cm³

- 1 × 100 cm³

- 100 cm³

Therefore , volume of unreacted oxygen

= 150 cm³ - 100cm³

= 50cm³

Answer ➡ Volume of unreacted oxygen is 50cm³

Additional Information :-

★ The number before the element after balancing is its volume

Eg :- 2 H2 = 2 vols of H2

Answer 2

Answer:

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