Question

calculate the mass percentage of oxygen in..(a) HgO. (b) k2Cr2O7​

Answer 1

Answer:

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Explanation:

a) Hg+O=201+16=217

   Now, O%= (16/217)*100

                   =7.373%

b) K2Cr2O7= 39*2+52*2+16*7

                   =1932

   Now, O%= (112/1932)

                   = 5.797%