A hydrocarbon mixture known to contain methane, ethene and butane only has a volume of 6.00L, a pressure of 2 bar and density of 2.404x103 g/mL at 25°C. When this mixture reacted with hydrogen gas in the presence of platinum metal, 0.3145 g of hydrogen gas was consumed. When the same amount of the mixture was completely combusted, 43.13g of carbon dioxide and 23.69g of water were produced. What was the mass percentage of methane in the mixture? (assume all reactions went to completion). 45% 19% 30% 50% 24%

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.