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The percentage composition of sodium phosphate as determined by analysis is 42.1% sodium, 18.9 % phosphorus and 39 % oxygen. Find the empirical formula of the compound[Na = 23, P = 31, O = 16].
A
Na3​PO3​
B
NaPO4​
C
Na2​PO4​
D
Na3​PO4​

ankit singh , 4 Years ago
Grade 12th pass
anser 1 Answers
Mayank Ranka

Last Activity: 4 Years ago

 

Element Percentage composition   Atomic weight    Relative No. of atoms    Simplest ratio
Sodium 42.1          23 42.1/23 = 1.83    1.83/0.61 = 3
Phosphorus 18.9     31 18.9/31 = 0.61 0.61/0.61 = 1
Oxygen 39.0     16 39.0/16 = 2.44 2.44/0.61 = 4
Thus empirical formula is Na3​3PO44​.

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