The mass in grams, to five sig figs, of carbon dioxide produced when 22.031 grams of C6H6 is combusted is the same as the mass of the least common isotope of element X?

Question

Leilani Friedman

Chemistry

31 October, 10:18

The mass in grams, to five sig figs, of carbon dioxide produced when 22.031 grams of C6H6 is combusted is the same as the mass of the least common isotope of element X?

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Answers (1)

Know the Answer?

Mara Powers · Answer 1

74.566

Explanation:

C6H6 + 02 = 6CO2 + 3H2O

2C6H6 + 15O2=12CO2 + 6H2O

mm of C6H6 = (12x6) + (6x1) = 72+6 = 78gram/mol

mass conc = 2x78=156

mm CO2 = 12 + (16x2) =

12+32 = 44gram/mol

mass conc of CO2 = 12x44

= 528

from The equation

156g of C6H6=528g of CO2

22.031g of C6H6=Xg of CO2

therefore, Xg=

22.031 x 528 / 156

= 74.566g