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Answered

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How many moles are in 30 grams of H3PO4?

Sagot :

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Mass = Moles x GFM

mass = 30g so;

30    = mol x GFM

To calculate the GFM, you require a data booklet or similar.
Mine tells me that the GFMs are:

H: 1               H₃ so 3 x 1 = 3
P: 31             P  so 1 x 31= 31
O:16             O₄ so 4 x 16 = 64 
                              GFM = 64 + 31 + 3 = 98

30 = 98 x mol

mol = 30 / 98

mol = 0.31 mol


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