Answer:
The octet rule isn't all its cracked up to be. It works fine for some of the elements in the second period, but begins to come unglued for many others.
NNO does follow the octet rule, and has at least three resonance structures
N=N=O <−> N≡N−O <−> N−N≡O
Formal charges suggest that the one in the middle is most likely.
NBF3 -- Really? Show me, because I don't think there is such a compound.
NICl2^- or NICl^2- ..... which is it?
NICl2 (neutral) is an analogue of NCl3 where iodine has replaced one chlorine. It follows the octet rule.
Explanation:
<span>If we use 100 mL of
solution:
V(ethylene glycol - C</span>₂H₆O₂) = 0,52 · 100 mL = 52 mL.<span>
V(water) = 0,48 · 100 mL = 48 mL.
m(C</span>₂H₆O₂) = 52 mL · 1,115 g/mL = 57,98 g.<span>
n(C</span>₂H₆O₂) = 57,98 g ÷ 62,07 g/mol = 0,934 mol.<span>
m(H</span>₂O)
= 48 mL · 0,988 g/mL = 47,424 g.<span>
n(H</span>₂O)
= 45,45 g ÷ 18 g/mol = 2,635 mol.<span>
mole fraction of solvent: 2,635 mol / (2,635 mol
+ 0,934 mol) =0,73.
Raoult's Law: p(solution) = mole fraction of
solvent · p(solvent).
<span>p(solution) = 0,73 · 92 torr = 67,33 torr.</span></span>
Assume that the side length of the cube is m.
Since all sides of the cube are equal, therefore, the volume of the cube can be measured using the following rule:
volume of cube = m^3
Substitute in this equation with the length given:
volume = (4.33)^3 = 81.1827 cm^3
From the standards of units conversions, 1 cm^3 = 0.001 liters
Therefore:
volume of cube = 81.1827 cm^3 = 0.0811827 liters
Answer:
A. wool, silkworm, cocoon, and cellulose
Explanation:
I hope this helped!
The process of uranium mining generates what is called uranium tailings. These are the waste by products of uranium mining. Tailings contain the radioactive decay products of the uranium atom and these products are quite radioactive. Radioactive particles found in tailings can emit anywhere from twenty to one hundred times as much radiation as the natural levels at natural uranium deposits. These radioactive byproducts can lead to cancer if exposed.
