What is the pressure of 5.0 mol nitrogen (N2) gas in a 2.0 L container at 268 K?
(The universal gas constant is 0.0821 L. atm/mol-K.)
O A. 55 atm
O B. 220 atm
O C. 0.018 atm
O D. 8.8 atm

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]