Calculate the number of moles of gas contained in a 0.325 L tank at 19C and 0.914 atm (R=0.08206 L atm/K mol)?

Thr specific heat of water is 4.184 J/gc, calculate to the correct number pf significan figures the number of joules needed to raised the temperature of 2.5 g pf water from 27C to 72C?

In the gas demdity lab, you used the dumas method to find the molar mass of an unknown sample. For this method to work all of the following must be true except:

a) must be weighted after it recondenses

b) must behave like an ideal gas whent vaporized

c) must have a lower of point than that of water

d) must be placed in a flask of unknown volume

e) none of the above