what is the number of moles of O-atom in126 amu PO4)-3
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number of moles of O atom is 2
I think so
I think so
Mahavar:
but how?
by mole concept
answer is 5.3/NA
but how
95/126= 1.32. number of O atom 4 hence 4×1.3=5.3. 6.022×10²³ is 1 mole so 5.3/6.022×10²³
Answered by
1
PO4^-3 mol.wt=95 g = 1 mole
We know that 95 g of po4^-3------------>4*Na(Avogadro no)of O atoms
126 g of po4^-3---------------> ?
By cross multiplying we get 5.2*Na of O atoms
= 31.2*10^23 O atoms
0.88 × 10^-23is right answer
But how?
5.3/6.022×10^23 mole concept
y r u dividing it by NA?
yes
why?
126/95=1.3 oxygen is 4 so, 1.3×4=5.3 that why 6.022×10²³ is 1 mole so 5.3/NA
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