Question

gas is directly proportional to the Kelvin temperature of the gas, if the volume and amount of gas remain constant B) The total pressure exerted by a mixture of gases in a container is the sum of the partial pressures that each gas would exert alone. C) The volume of a gas is directly proportional to the number of moles of the gas, if the pressure and temperature remain constant D) The volume of a gas is directly proportional to the Kelvin temperature of the gas, if the pressure and amount of gas remain constant. E) The pressure of a gas is inversely proportional to the volume of the gas, if the temperature and amount of gas remain constant 27) What mass of helium is contained in a 2.0 L, balloon at 30.00C and 735 mm Hg? 27) E) 0.477 g A) 26.5 g B) 66.1 g D) 514 g C) 0.312 g 28) What quantity is directly proportional to the kinetic energy of the particles in a gas? 28) A) absolute temperature B) distance between molecules C) formula mass D) volume of the individual particles E) atomic mass 29) A sample of oxygen gas occupies 3,0 L at a pressure of 1.5 atm. If the volume of this sample increases without changing the temperature or the amount of gas, what can be said about the pressure? A) The pressure of oxygen will be greater than 1.5 atm. B) The pressure of oxygen will remain at 1.5 atm. C) The pressure of oxygen will be less than 1.5 atm. D) The pressure of oxygen will be 4.5 atm. E) It is impossible to predict. 6

Answer 1

kindly post different questions separately. please rate

27) PV = DRT P- Pressure of gas volume of gas temperature = m (ideal gas equation! .n= moles of gas R= ideal gas constant R = 0.082057 Latm moltky m= man of gas - PV=MRT M = molar me for He M= 4.0 gimol V=2104 T= 30.0°C = 303k P = 735 mm Hg = 0.967 atm (760 mm Hg - latm) m= PVM RT = 0.312 g. mo 01965 atm x 200L X 4.09lmol 0.082057 Latm moltky X 303k is correct. Hence, option