Answer:
Option D. 1191.49 K
Explanation:
The following data were obtained from the question:
Change in enthalphy (ΔH) = 280 kJ/mol
Change in entropy (ΔS) = +235 J/Kmol
Temperature (T) =...?
Next, we shall express the enthalphy in joule (J). This is illustrated below:
1 KJ/mol = 1000 J/mol
Therefore, 280 kJ/mol = 280 x 1000 = 280000 J/mol
Therefore, 280 KJ/mol is equivalent to 280000 J/mol
Now, we can obtain the temperature at which the reaction was feasible as follow:
ΔS = ΔH/T
235 = 280000/ T
Cross multiply
235 x T = 280000
Divide both side by 235
T = 280000/235
T = 1191.49 K
Therefore, the temperature at which the reaction was feasible is 1191.49 K
Answer:
A.endoplamic reticulum
Explanation:
The endoplamic reticulum is an important organelle in protein synthesis. The nucleus contains DNA, which is the template for transcription of mRNA. mRNA acts as a message, which leaves the nucleus to become translated into proteins.
The endoplasmic reticulum is important in the synthesis, folding, and modification of proteins.
Answer:
97.5%
Explanation:
the US mint specifies pennies as 2.5% copper in 97.5% zinc
Chlorine, as a halogen, has oxidation number 1-, so in SiCl4, the charge of Si is 4+. This means that Si goes from 4+ to 0 charge, so it gains electrons and undergoes reduction. Meanwhile, Mg goes from 0 to 2+ charge, so it loses electrons and is oxidized. The oxidizing agent (which is the one reduced) is SiCl4, while the reducing agent (which is oxidized) is Mg.
