Posted by Perry on Tuesday, August 23, 2011 at 8:29am.
first we write the balanced chemical reaction:
C + 2 H2 -> CH4
*note that Hydrogen is diatomic in nature (that's why it's H2, not H)
then to get how much H2 reacted (in grams), we use the data of Carbon. 1 g of Carbon reacted, thus to get the number of moles of C, we divide 1 g by its molar mass (which is 12 g/mol)
1/12 = 0.0833 mol C
using the stoichiometric coefficients (number before the chemical symbol in the reaction) of the elements, we can relate the number of moles of C reacted to the number of moles of H2 reacted:
0.0833 mol C * (2 mol H2 / 1 mol C) = 0.1667 mol H2
then from the given, 0.33597 g of H is used. to convert this to grams of H2, we just divide 0.33597 by 2:
0.33597 g H / 2 = 0.167985 g H2
finally, to the the molar mass of H, we divide grams of H2 by moles of H2:
0.167985 / 0.1667 = 1.01 g/mol
hope this helps~ :)
Related Questions
bilogy - methane which is composed of carbon and hydrogen, lacks fuctional ...
chemistry - Which of the following is generally defined as a substance composed ...
chemistry - A 25g sample of a compound composed of Carbon, Hydrogen, and Oxygen ...
Chemistry - A compound containg 3 atoms of carbon and 8 atoms of hydrogen is ...
Chemistry - A compound containg 3 atoms of carbon and 8 atoms of hydrogen is ...
Chemistry - Question 1. (SEE QUESTION 2 ) A Compound Containing 3 Atoms Of ...
Chemistry - Methane has one carbon and by mass there are three grams of carbon ...
Chem - which substance cannot be decomposed by a chemical change? carbon dioxide...
chemistry - Write and balance the chemical reaction when gaseous carbon monoxide...
College Chemistry - A gas containing carbon and hydrogen analyzed as 85.6 % ...
For Further Reading
