Answer:
If gas is cooled the particles will then stop moving about really fast and start to form a liquid. This is called condensation.. (i think) and it happens at the same amount of temperature as or when boiling. Evaporation is dependent on individual particles gaining enough energy to escape the surface of the liquid and become gas particles.
Another comment: Can you please look at my question? I really need help as well.
Also use this website for more help on these questions its called states of matter: basics
Answer:
I have the same thing it's hard
B - CCL4
This is because it doesn't say Dicarbon or any of that sort, so Carbon is alone. This immediately eiminates the option of C.
A is incorrect as it has Chlorine first rather than Carbon, so that's also incorrect.
D is incorrect as 7 is hepta rather than tetra.
The list is as so;
Mono - 1; Di - 2; Tri - 3; Tetra - 4; Penta - 5; Hexa - 6; Hepta - 7; Octa - 8; Nona - 9; Deca - 10.
Hope this helps!
Answer:
The element is Na
Explanation:
Ionization energy is the energy needed to release the last electron from an atom in its ground state to the gaseous state. It is a periodic property that increases as we go through the periods of the periodic table, but decreases if we move in groups. Sodium has thr ionic radius (another periodic property) that is too large, making it easier to release the electron away, since it is too far from the nucleus.
PV = nRT (where P = pressure; V = volume; n = number of moles; R = gas constant; T = Temperature)
Moles of He = mass of He ÷ molar mass of He = 10 g ÷ 4 g/mol = 2.5 mol
Now, based on the formula above P = (nRT) ÷ V
P = (2.5 mol × (0.082 L · atm/mol · K) × 233 K) ÷ 73 L ≈ 0.65 atm
