# ? mol / 1.222L = 3.16 x #10^-11#M

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Do I multiply or divide?

Do I multiply or divide?

##### 1 Answer

May 11, 2018

I'll let you evaluate it...

#"? mol" = 3.16 xx 10^(-11) "mol"/cancel"L" xx 1.222 cancel"L" = ???#

If this is regarding bromide anions, how many bromide atoms are in this? Highlight below to see the answer.

#color(white)(3.862 xx 10^(-11) cancel("mols Br"^(-)) xx (6.022 xx 10^23 "atoms")/cancel("1 mol anything ever"))#

#color(white)bb(= 2.326 xx 10^13 "atoms Br"^(-))#