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Finding molar mass of unknown element

  • Thread starter mjolnir80
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Homework Statement


element X reacts with oxygen to produce a pure sample of X2O3 . in an experiment, it is found that 1.0g of X produces 1.1596g of X2O3 . what is the molar mass of X?


Homework Equations





The Attempt at a Solution


well we can write a equation for it 4X + 3O2 ---> 2X2O3
from this we can see that 4 moles of X gives 2 moles of X2O3.
so 4*x(x is molar mass of X)g of X gives 2x+96 g of X2O3
where do we go from here?
 

Answers and Replies

  • #2
Borek
Mentor
28,446
2,841
You don't need reaction equation to solve the question. Can you calculate number of moles of metal knowing number of moles of oxygen? Can you calculate mass of oxygen from the numbers given?
 

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