Halothane is one of the modern anesthetics which is nonflammable and relatively safe for patients.What is the molar mass of halothane if 456 milligrams is 52.8 milliliters at 22 °C and 805 Torr? A)1.06 × 10^{3 g/mol} B)209 ^g/mol C)197 ^g/mol D)221 ^g/mol E)14.7 ^g/mol

Question

Quizplus · Accepted Answer

The molar mass of halothane can be calculated using the ideal gas law:PV = nRTwhere P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.We can rearrange this equation to solve for n:n = PV/RTWe can then use the molar mass (M) to convert the number of moles to mass:mass = nMWe are given the following information:P = 805 Torr = 1.06 atmV = 52.8 mL = 0.0528 LT = 22 °C = 295 Kmass = 456 mg = 0.456 gWe can now calculate the number of moles of halothane:n = PV/RT = (1.06 atm)(0.0528 L)/(0.0821 Latm/(molK))(295 K) = 0.00221 molWe can then calculate the molar mass of halothane:M = mass/n = 0.456 g/0.00221 mol = 209 g/molTherefore, the molar mass of halothane is 209 g/mol.

Halothane Is One of the Modern Anesthetics Which Is Nonflammable