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Social Scienceprovide an example of how to calculate empirical formula and then how to find molecular formula from this
provide an example of how to calculate empirical formula and then how to find molecular formula from this
Expert Answer
In the determination of molecular formula, first step is the determination of its empirical formula.
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Mass of A atomsDivide by Moles of A atoms molar mass A to B mole ratio Divide by lowest number of moles Mass of B atoms Moles of B atoms Divide by molar mass Convert ratio to lowest whole numbers Empirical formula
Take Nicotine as an example, and assume it contains 74.02 % C, 8.710 % H, and 17.27% N. Consider, 40.57 g of Nicotine consists of 0.25 mol Nicotine.
First, calculate the moles of each element,
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(74.02gCImol C6.163mol C 12.01g C (8.710 g HImolH8.624molH 1.01g H (17.27gN mol N1.233mol Nn 14.01g C
Calculate the molar ratio...
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6.163mol C/1.233mol N = 5 8.264molH 1.233molN = 7 1.233 mol C/1.233 molN =1
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