How many moles of butane (C4H10(9)) were combusted in the presence of excess oxygen gas if 47.5 L of water vapour at STP is collected? Hint: Write a balanced chemical reaction equation first. Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units. Answer:

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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.