Answer: -
1595 g
Explanation: -
Heat of vaporization = 2.4 Kj/ g
Mass of water to be vaporized = 50 g
Heat released = Mass of water to be vaporized x Heat of vaporization
= 50 g x 2.4 KJ /g
= 120 KJ
= 120000 J
Initial temperature= 33+273= 306 K
Final temperature =15+273=288 K
Change in temperature required = T = 306 - 288 = 18 K
specific heat of water is 4.18 J / g K
Mass of water that can be cooled = Total heat / (specific heat of water x Change in temperature)
= 120000 J / ( 4.18 J / g K x 18 K)
= 1595 g
The electron cloud model uses the basic idea of Bohr's model, representing the atom as if it were cut in half. The difference is that Bohr's model showed electrons in "shells" which modeled that they moved only in a distinct orbit around the nucleus. The modern model has layers of electrons, but models the concept that they form a cloud where their exact position is impossible to known (considering is changes). The modern model explains that electrons are not at a fixed distance from the nucleus, but the Bohr model does not represent this understanding, instead, it displays a concept that the electrons are at fixed levels of orbit.
B. caulculating the distance between objects in the solar system
1. Both evaporation and condensation are steps in the water cycle.
2. Both are affected by atmospheric conditions.
Let me know how you did, good luck! :D
3.97×1023 molecules C2H6 1 mol C2H6
------------------------------------------ x ------------------------------------ = 0.66 mol C2H6
6.022 x 1023 molec. C2H6