Question

percentage composition of Potassium dichromate​

Answer 1

Answer:

Potassium -26.581%

Explanation:

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Answer 2

Answer:

35.35

%

Explanation:

Percentage composition of an element in a compound is given by

% composition of element

=

Mass of element in compound

Mass of compound

×

100

Let’s say we have

1

mol of potassium dichromate (

K

2

Cr

2

O

7

)

Mass of

1 mol

of compound

= 294.185 g

Mass of

Cr

in

1 mol

of compound

= 2 × 52 g = 104 g

% composition of Cr

=

104 g

294.185 g

×

100

=

35.35

%