Chemistry

How many moles of KF are contained in 244 mL of 0.135 m KF solution? The density of the solution is 1.22 g/mL.

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  1. Do you mean 0.135m or do you mean 0.135M?

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  2. 0.135m

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  3. I actually was able to figure it out

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  4. I would do this.
    Convert 0.135m to ?M first.
    Take 1000 mL of 0.135m, it will contain 0.135 mols KF. How many grams is that?
    That's 0.135 x molar mass KF = about 7.8g(but that's an estimate and you should redo this and all of the other calculations that follow for they are estimates also). mass of the solution then is 1000 + 7.8 = about 1007.8 grams. What's the volume? That's v = m/d = 1007.8/1.22 = about 0.860 L or
    0.135/0.860 = about 0.16 M.
    Then mols KF = M x L = ?

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