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1.000 gram of compound A burns in excess oxygen (i.e., compound A is completely reacted) and...

1.000 gram of compound A burns in excess oxygen (i.e., compound A is completely reacted) and yield 3.083 g of CO​2​​ and 1.419 g of H​2​​O

a)What is the mass of hydrogen in 1.000 g of compound A?

b)What is the mass percentage of hydrogen in compound A?

c)Does compound A contain any other element(s)?

For part a, i tried entering two values i got, 0.4 and 0.14, both were wrong.

Can someone please explain how to solve this in details

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