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The number of F^- ions in 2.1 g AlF3 is ...

The number of `F^-` ions in 2.1 g `AlF_3` is `(N_A=6xx10^23)`

A

`1.5xx10^22`

B

`6xx10^22`

C

`3xx10^22`

D

`4.5xx10^22`

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