Question

GENERAL CHEMISTRY LABORATORY FINA HML 142RATORY NAME FINAL EXAMINATION KILI LAST FIRST 1. Answer all the questions 2. Show all your work clearly Give your answer in proper significant figures and with proper units Draw the graphs with a pencil and label them property even gas has the following properties. It has a mass, m, volume, V. pressure, P and temperature Wuite an equation that relates the molar mass of the gas, MM in terms of the given properties (b) Fill the table below with proper units of mass pressure, volume, temperature and molar mass used in the above equation. Units Pressure, P Volume, V Temperature, T Mass, m Molar mass, MM (c) A 0.338 g sample of unknown gas has a volume of 124 mL at 29.1 in. of Hg and a temperature of 99.0°C. Calculate the molar mass of the gas.

Answer 1

MM 1) let gas X2 a) mass = mgm Molar Mass = MM gm/mol no.of moles (n) = m mol Pressure = Datm volume = v litr Temp = Tk ideal gas equation (hey constant PV = nRT MRT PV = MRT → R = 0.0821 Latm mothat MM = MM PV Are (b) units :- Pressure (P) = catm volume (0) = Litre Temperceture (T) = Kelvin (k) Mass (m) = gm Molar mass (MM) = gm/mol ( m = 0.338 gm v= 124me 0-124 Lit P = 29.) in Hg =) i in Hq = 0.0334 cm P = (29.) x 0.0334) = P = 0.9719 atm T = 99°C =) (99 + 27315) K = T = 372.15 K MM - MRT = 0-338 x 0.0821 x 372-15 0.9719 x 0-124 MM = 85.68gminal Lane pv