Question

34) Which of the followine represent STP Standard Temperature and Pressure) conditions A) TOK and Plam BT-0"C and P760 atm CT-273 K and P-0 atm D) T-273 K and P lam ETIK and Patm 25) 23) Which of the following is TRUE for a liquid that is placed in a sealed container? A) Condensation of the evaporated molecules in the car can only occur once all of the liquid molecules are in the vapor for gaseous) state. B) A set vapor pressure will be reached, which is the same at all temperatures. C) Evaporation of the liquid cannot o ut D) All molecules stay in the liquid state El Once equilibrium is established between the liquid and the vapor, the rate of the evaporation process will equal the rate of condensation 26) 26) Which of the following statements correctly describes Boyle's Law? A) The pressure of a gas is directly proportional to the Kelvin temperature of the as if the volume and amount of gas remain constant B) The total pressure Cented 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 30.0°C and 735 mm Hg? A) 2658 B) 66.18 C) 0.3128 D) 514 g E) 0.477 g 27) 28) What quantity is directly proportional to the kinetic energy of the particles in a gas? A) absolute temperature B) distance between molecules C) formula mass D) volume of the individual particles E) atomic mass 28) 29) 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.

Answer 1

Per Conditios deaided by IUPAC,Value of 4tandard temperature and preyre are deeided universaliy a T= 27 3 K andP19tm D)