If 30 mL of `H_(2)` and 20 mL of `O_(2)` react to form water, what is left at the end of the experiment ?

Options

A. 10 mL of `H_(2)`
B. 5 mL of `H_(2)`
C. 10 mL of `O_(2)`
D. 5 mL of `O_(2)`

Answer

D

Explanation

`{:(H_(2)(g),+,1//2O_(2)(g),rarr,H_(2)O(g)),("1 mol",,"1/ mol",,"1 mol"),("1 mL",,"1/2 mL",,"1 mL"),("30 mL",,"15 mL",,"30 mL"):}`
Volume of `O_(2)` left uncreacted
`=20-15=5 mL`