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MW =3*39+1*31+4*16 = 212

in K3Po43 mol K+ ions produce.

1 mol weigh = 212 contain 3x6.023x10^23 K+ ions

6.76g contain = 6.76 x 3 moles K+ x 6.023x10^23 / 212 g/mol

= 5.76x10^22

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