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The percentage of element M is 53 in its...

The percentage of element M is 53 in its oxide of molecular formula `M_(2)O_(3)`. Its atomic mass is about

A

45

B

9

C

18

D

27

Text Solution

Verified by Experts

The correct Answer is:
D
If m is the atomic mass of the element M, then
`2m+48g" of "M_(2)O_(3)" contain O"=48g.`
`therefore %" of O in "M_(2)O_(3)=(48)/(2m+48)xx100=53" (Given)"`
`therefore" "2m+48=(4800)/(53)=90.56`
`"or "2m=42.56" or "m=26.28~~27`
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