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azamat
3 years ago
12

How many moles of potassium nitrate, KNO3 are present in a sample with a mass of 85.2 g?

Chemistry
1 answer:
Bingel [31]3 years ago
5 0
0.843 moles would be the answer
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GenaCL600 [577]

The HCl added = 1.25 moles

and the moles of Na2HPO4 = 1 mole

Now when acid is added in the given solution of Na2HPO4

One mole of H+ will react with one mole of Na2HPO4 to given one mole of NaH2PO4

Na2HPO4  + H+  ---> NaH2PO4

Now this one mole formed NaH2PO4 will further react with 0.25 moles of H+ left to form 0.25 moles of  H3PO4 and 0.75 moles of NaH2PO4 will remain in the solution

So this will result into formation of a buffer of phosphoric acid and NaH2PO4

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7 0
3 years ago
Ba2+(aq)+SO42−(aq)→BaSO4(s)
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4 0
3 years ago
A solution composed of 30.6g NH3 in 81.3g of H20. Calculate the mole fraction for NH3 and H20
irina [24]

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4 0
2 years ago
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Element A has a half-life of 10 days. A scientist measures out 200 g of this substance. After 30 days has passed, the scientist
myrzilka [38]
N=N₀*2^(-t/T)

N₀=200 g
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4 0
3 years ago
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sertanlavr [38]

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3 years ago
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