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Oksi-84 [34.3K]
3 years ago
6

I would like a list of random, interesting facts about Francium.

Chemistry
1 answer:
Maurinko [17]3 years ago
6 0
<span>It has the highest equivalent weight of all elements.
</span><span>Prior to its discovery, it was simply referred to as eka-caesium.
</span><span>The most stable isotope, Fr-223, has the longest half-life at 21.8 minutes.
</span><span>Francium has thirty-four known isotopes, with only two of them occurring in nature.
</span><span>It is the most unstable of all elements that occur naturally.
</span>Hope this helps.
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8 0
3 years ago
A sample of gas in which [h2s] = 3.50 m is heated to 1400 k in a sealed vessel. after chemical equilibrium has been achieved, wh
Bond [772]
The value of Kc for the thermal decomposition of H₂S is 2.2 x 10⁻⁴ at 1400 K:
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initial                  3.5 M               0           0
at equilibrium     3.5 M - 2x       2x          x
Kc             = [S₂][H₂]² / [H₂S]² 
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6 0
3 years ago
Please select the best answer and click "submit."
vladimir1956 [14]
When it comes to physical changes like phase changes, there are two types of heat energy: sensible heat and latent heat. Sensible heat is the heat absorbed/released when you heat the substance but it doesn't change phase. An example would be heating lukewarm water. The substance is liquid all throughout. Latent heat, on the other hand, is the heat absorbed/released when there is a phase change. An example would be boiling water, because it changes liquid to vapor. 

Hence, for freezing liquid, you use the latent heat, specifically the heat of fusion. The answer should be

2.5 g * (1 mol/18.02 g) * 6.03 kJ/mol = 0.84 kJ/mol

The answer is not in the choices. You only use Hvap if you boil water.
5 0
3 years ago
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