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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: JamesAdams1 on December 16, 2017, 04:12:50 PM

Title: Moles analysis of combustion
Post by: JamesAdams1 on December 16, 2017, 04:12:50 PM

Z is an organic compound and is found to contain carbon, hydrogen and oxygen only. combustion analysis of 0.500g of compound Z found it contained 0.133g carbon and 0.0111g hydrogen.
Molecular formula of z is C2H2O4.

0.0111g of hydrogen isolated from compound z was collected as water.

calculate the mass of water produced by 0.500g of Z during combustion analysis.

no idea please help.

Title: Re: Moles analysis of combustion
Post by: sjb on December 16, 2017, 05:07:42 PM

0.0111g of hydrogen is how many moles? How many moles of water are made when that combusts? What is the mass of that amount of water?

Title: Re: Moles analysis of combustion
Post by: JamesAdams1 on December 17, 2017, 04:55:23 AM

0.00555 moles of hydrogen. 0.0111/2. Then multiply 18 to get 0.0999.