help me with those two questions please. 1.Menthol is composed of C,H, and O. A

Question

help me with those two questions please. 1.Menthol is composed of C,H, and O. A 0.1005g sample ofmenthol is combusted, producing 0.2829g of CO2 and 0.1159g of H2O.what is the empirical gormula for menthol? 2. If menthol's molar mass is 156g/mol, what is its molecularformula? help me with those two questions please. 1.Menthol is composed of C,H, and O. A 0.1005g sample ofmenthol is combusted, producing 0.2829g of CO2 and 0.1159g of H2O.what is the empirical gormula for menthol? 2. If menthol's molar mass is 156g/mol, what is its molecularformula?

Explanation / Answer

.2829 g CO2 x (1 mol/44 g) = .00643 mol CO2 = .00643 mol C .1159 g H2O x (1 mol / 18 g) = .00643 mol H2O = .0129 mol H .00643 mol C x (12 g / 1 mol) = .0772 g C .00129 mol H x (1 g/1mol) = .0129 g H Total: .0772 + .0129 = .0901 g .1005 g - .0901 = .0104 g O .0104 g O x (1 mol/16 g) = .00065 mol O Divide all moles of C, H, and O by the smallest number (.00065) .00643 / .00065 = 10 C .0129 / .00065 = 20 H .00065/.00065 = 1 O Empirical: C10H20O b) Mass of C10H20O = 156 g/mol Since the molar mass is the same (156 g/mol), the molecular formulais the same as empirical

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