How to Calculate the Percentage Composition of a Compound?

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To calculate the percentage composition of a compound, the total mass of each element must be determined. In this case, the sample contains 0.09 g of carbon (C), 0.1264 g of oxygen (O), and 0.0158 g of hydrogen (H). The total mass of the sample is the sum of these masses. However, there is uncertainty regarding whether the original substance contains oxygen, which complicates the calculation. Accurate percentage composition requires clarity on the presence of all elements in the compound.
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A simple of an unknown with plants decomposition of the sample produces 0.09. 48 G of C , 0.1264 g of O and 0.0158 g of H . What is the % composition of the compound ?
 
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donniemsb_12 said:
A simple of an unknown with plants decomposition of the sample produces 0.09. 48 G of C , 0.1264 g of O and 0.0158 g of H . What is the % composition of the compound ?

Looks to me like there is not enough information - are you told whether the original substance contains oxygen, or not?
 
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