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If 3.01 xx 10^20 molecules are removed f...

If `3.01 xx 10^20` molecules are removed from 98 mg of `H_2SO_4`, then number of moles of `H_2SO_4` left is_______.

A

`0.1 xx 10^-3 mol`

B

`0.5 xx 10^-3 mol`

C

`1.66 xx 10^-3 mol`

D

`9.95 xx 10^-2 mol`

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