Un recipient de volum V=1 m3 (la puterea 3 a ) conţine oxid de azot (NO) ,în condiţii normale de temperatură şi presiune (Vµ0= 22,42 m3/kmol, µN2=28kg/kmol ). Să se calculeze:

a) masa molară aoxidului de azot;

b) masa unei molecule;

c) numărul de molecule

d) densitatea gazului.

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).

Calculate the minimum energy required to remove one proton from the nucleus 126c. this is called the proton-removal energy. (hint: find the difference between the mass of a 126c nucleus and the mass of a proton plus the mass of the nucleus formed when a proton is removed from 126c.) express your answer with the appropriate units. emin e m i n = nothing nothing request answer part b how does the proton-removal energy for 126c compare to the binding energy per nucleon for 126c, calculated using eb=(zmh+nmn−azm)c2?

For those who need theses answers i just took the test and got everyone of them