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Calculate the massof oxygen obtained by ...

Calculate the massof oxygen obtained by complete decomposition of 10kg of pure potassium chlorate (Atomic mass K=39,O=16 and Cl=35.5).

A

39.2kg

B

392kg

C

3.92kg

D

3kg

Text Solution

Verified by Experts

The correct Answer is:
C
`2KCIO_(3)(s)rarr2KCI(s)+3O_(2)(g)`
2 mol 3 mol
`2xx122.5g 3xx32g`
=245g =96g
Mass of `O_(2)` obtained from 10kg `KCIO_(3)=(96)/(245)xx10=3.92` kg
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