Eran monumentos funerarios, de manera que su principal función era la de acoger tumbas de los faraones para que el viaje al cielo fuese más sencillo
Roughly 19,089,294,774,226,281 years
Answer:
ethyl acetate layer
Explanation:
This question tests your knowledge of the principle of solvent extraction.
In solvent extraction, there is always an organic layer and an aqueous layer. The ethyl acetate is the organic layer while the sodium bicarbonate is the aqueous layer.
A brominated aromatic compound will be extracted into the organic layer (ethyl acetate layer).
Answer:
a)
Explanation:
The temperature of 525 K, so to identify which is the state of a substance, we need to now the melting and the boiling point of it, which can be found in thermodynamic tables. To be liquid, the melting point must be less than 525 K (so the substance is not a solid anymore), and the boiling point must be higher than 525 K (so the substance doesn't go to gas).
Substance Melting point at 1 atm (K) Boiling point at 1 atm(K)
Bi 544.7 1837
Pt 2041.4 4098
Se 494 958
Ca 1115 1757
Cu 1357.77 2835
Thus, when pressure increase, the melting point decrease, so, if the pressure is little higher than 1 atm, then bismuth can be found as a liquid at 525 K. The others would need a higher pressure to be liquid at 525 K.
