Can someone please help me with this Chemistry question?

H

Hello

New member
This is the question: Calculate the mass of hydrogen, oxygen, and sulfur in a 100-gram sample of a compound that conatins 2.1 percent hydrogen, 65.3 percent oxygen, and 32.6 percent sulfur.

I know i have 100g sample and that is made up of:
2.1% H
65.3% O
32.6% S

Becuase its a 100g sample the percentage of each element is directly proportional to the mass of each elemnt right? So is that like 2.1% of H in a 100g sample is 2.1g of H.

But then what is the next step from here? can someone please help me! thanx!
 
yeah exactly. 2.1% is Hydrogen so thats 2.1 grams of Hydrogen. Do the same with the rest. You know there will be 65.3 grams of Oxygen and 32.6 grams of Sulfer because you do 65.3% of 100 to get 65.3. If they ask you how many moles this is, just convert grams to moles by dividing the number of grams by the molecular weight. For example, 65.3 grams of Oxygen * (1 mole of Oxygen/16 grams of Oxygen) give you about 4 moles of Oxygen. :) But yeah, you're on the right track. Nice job. You got it! :)
 
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