# chemistry

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how many moles are in 25.0 grams of potassium?

• chemistry -

1 mol Potassium = 39g [Atomic Mass of K]
x mol Potassium = 25g

x = 25*1/39 = 0.641 mol

Hope that helps.

• chemistry -

I would remove the 1 and make the answer 0.64 since there are only two significant figures in 25 and 39.

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