Respuesta :

Answer:

Explanation:

Total mass of substance = 7.22 + 2.53 + 5.25 g

= 15 g

percentage of nickel = 7.22 x 100 / 15

= 48.13

= 48.1 %

percentage of phosphorus  = 2.53 x 100 / 15

= 16.87%  

= 16.9%

percentage of oxygen  = 5.25 x 100 / 15

= 35 %  

The percent composition of the pure substance should be 48.1%, 16.9%, and 35%.

Calculation of the percent composition:

Total mass of substance = 7.22 + 2.53 + 5.25 g

= 15 g

Now

percentage of nickel = 7.22 x 100 / 15

= 48.13

= 48.1 %

And,

percentage of phosphorus  = 2.53 x 100 / 15

= 16.87%  

= 16.9%

And, finally

percentage of oxygen  = 5.25 x 100 / 15

= 35 %  

learn more about oxygen here: https://brainly.com/question/11820632

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