A 2.00 g sample of methamphetamine was found to contain 1.61 g C, 0.203 g H, and 0.188 g N.What is its empirical formula?

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Quizplus · Accepted Answer

The empirical formula is the simplest whole number ratio of the elements in a compound. To find the empirical formula, we need to convert the mass of each element to moles.Mass of C = 1.61 gMoles of C = 1.61 g / 12.01 g/mol = 0.134 molMass of H = 0.203 gMoles of H = 0.203 g / 1.01 g/mol = 0.201 molMass of N = 0.188 gMoles of N = 0.188 g / 14.01 g/mol = 0.0134 molThe mole ratio of C:H:N is 0.134:0.201:0.0134. Dividing each mole ratio by the smallest mole ratio (0.0134) gives the empirical formula:C10H15N

A 200 G Sample of Methamphetamine Was Found to Contain 1