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Balance the given equation and then write down the answers for the questions given below. CH4 + O2 → CO2 + H2O a. How many moles of CO2 formed when 20 moles of Methane burns in air? 2C2H6 + 7O2 → 4CO2 + 6H2O b. Based on the equation above, How many moles of CO2 is formed when 10 moles of Ethane is burned in air ? |
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Answer» a. When 1 mole of methane bum in air 1 mole of CO2 gas is formed. When 20 moles methane burn 20 moles of CO2 are formed. The molecular weight of 20 moles = 20 × 44 = 880 g b. When 2 moles of ethane is burned 4 moles of CO2 is formed. The number of moles of CO2 when 1 mole of ethane is burned = 4/2 = 2 mole. The number of moles when 10 moles of ethane bums = 2 x 10 = 20 mole. Weight of 20 moles = 20 × 44 = 880 g |
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