Answer these questions.

Physical constants which may be necessary to answer the problems on this page can be found within the hint tabs. Don't forget that one mole of gas contains 6.02 x 1023 molecules, and that the mass of this amount is called the 'molar mass'. How many molecules of gas do you need in a 100 cm3 cylinder to exert a pressure of 1.0 x 108 Pa at a temperature of 800 OC? Give your answer to 2 signicant gures. Value Physical constants which may be necessary to answer the problems on this page can be found within the hint tabs. Don't forget that one mole of gas contains 6.02 x 10" molecules, and that the mass of this amount is called the 'molar mass'. Complete the questions in the table, giving your answers to 2 significant figures unless stated otherwise. P1 /Pa V1 / cm3 T /K P2 / Pa V2 / cm3 T2 / K 1.01 x 105 30 300 (a) 20 300 1.01 x 105 30 300 (b) 30 373 1.01 x 107 2 600 1.01 x 105 (c) 300 1.01 x 105 500 (d) 1.01 x 107 10 4