When phosphours `(P_(4))` is heated in limited amount of `O_(2).P_(4)O_(6)` (tetraphosphorous hexaoxide) is obtained, and in excess of `O_(2)`, `P_(4) O_(10)` (tetraphosphours decaoxide) is obtained.
i. `P + 3 O_(2) rarr P_(4) O_(6)`, ii. `P_(4) + 5O_(2) rarr P_(4)O_(10)`
How many moles of `O_(2)` left unreacted initiallyin reaction (i) ?

Options

A. 0.0145 mol
B. 0.072 mol
C. 0.029 mol
D. 0.0048 mol

Answer

A

Explanation

Moles of `O_(2)` left unreacted initially in reaction (i)
`= 0.0145 "mol" O_(2)`