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In: Chemistry

calculate the percentage by mass of oxygen in the following compounds. C17H19NO3

calculate the percentage by mass of oxygen in the following compounds. C17H19NO3

Solutions

Expert Solution

We know the atomic masses are as, C=12, H=1, N=14, O=16, from this let’s calculate the molecular mass.

Molecular mass of C17H19NO3 = (17 x at. mass of C) + (19 x at. mass of H) + (1 x at. mass of N) + (3 x at. mass of O)

= (17 x 12) + (19 x1) + (1 x 14) + (3 x 16)

= 204 + 19 + 14 + 48

=285

Molecular mass of C17H19NO3 = 285

Now, % mass of Oxygen is calculated by formula,

% mass of O = (total mass of 3 O atoms/ Molecular mass) x (100)

                      = [(3 x 16) / 285] x 100

                      = (48/285) x 100

                      =16.84 %

Hence % by mass of O in given compound is 16.84.

queen_honey_blossom answered 2 years ago
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