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    				| 1. | calculate mass percentage of different elements of methane? | 
| Answer» In methane there are only 2 elements, Carbon and Hydrogen. The total mass of a methane molecule (CH4) is 14 x 1 + 12 = 16. %mass of H in methane= 4/16 x 100% = 25%%mass of C in methane = 12/16 x 100% = 75% thanks sir | |