m/ibiscms/mod/ibis/view.php?id -4842682 emed... BankMobie: Open A.. chase ge, In
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m/ibiscms/mod/ibis/view.php?id -4842682 emed... BankMobie: Open A.. chase ge, InterAmerican -CHM 1045-Spring18-MOREJON Activities and Due Dates HW3 Gradeb 2/21/2018 08:00 AM 0 050 -Print Calculator-Periodic Table Question 1 of 31 University Science Books presented by Sapling Leaming General Chemistry 4th Edition The compound known as butylated hydroxytoluene, abbreviated as BHT, contains carbon, axygen. A 4.001 g sample of BHT was combusted in an oxygen rich environment to produce 11.99 g of COxg) and 3.925 g of H0(g) en, and Insert subscripts below to appropriately display the empirical formula of BHT CHO Previcus Give Up & View Solution Check AnswerNext x Hint Consider what the products and reactants are involved in a combustion reaction. MacBook AirExplanation / Answer
let in compound number of moles of C, H and O be x, y and z respectively
Number of moles of CO2 = mass of CO2 / molar mass CO2
= 11.99/44
= 0.2725
Number of moles of H2O = mass of H2O / molar mass H2O
= 3.925/18
= 0.2181
Since 1 mol of CO2 has 1 mol of C
Number of moles of C in CO2= 0.2725
so, x = 0.2725
Since 1 mol of H2O has 2 mol of H
Number of moles of H = 2*0.2181 = 0.4361
Molar mass of O = 16 g/mol
mass O = total mass - mass of C and H
= 4.001 - 0.2725*12 - 0.4361*1
= 0.2949
number of mol of O = mass of O / molar mass of O
= 0.2949/16.0
= 0.0184
so, z = 0.0184
Divide by smallest to get simplest whole number ratio:
C: 0.2725/0.0184 = 15
H: 0.4361/0.0184 = 24
O: 0.0184/0.0184 = 1
So empirical formula is:C15H24O
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