Question

What is the percent composition of phosphoric acid H3PO4

Answer 1

Hey there!:

Molar mass H3PO4 = 97.9952 g/mol

Atomic Masses :

H = 1.00794 a.m.u

P = 30.973762 a.m.u

O =  15.9994 a.m.u

H % =  [ ( 1.00794 * 3 ) /  97.9952  ]  * 100

H% = 3.0857 %

P % = [ ( 30.973762 * 1 ) / 97.9952 ] * 100

P% = 31.6074 %

O % = [ ( 15.9994 * 4 ) / 97.9952 ] * 100

O% = 65.3069 %


Hope this helps!