Answer:
67.7 °C
Explanation:
Since this solution has 2 substances, but not in the same proportion, you need to consider the fraction molar of each one and the boling point, it will be expected a higher temperature than the lower boiling point and a lower boiling point of the highest boiling point.
46 °C x 0.69 = 31.74 °C
116°C x 0.31 = 35.96 °C
You add both: 31.74 °C + 35.96°C = 67.7 °C
Element No. of protons Neutrons Electrons
Sulfur 16 16 16
Cobalt 27 33 27
Uranium 92 146 92
Lead 82 125 82
Explanation:
The subatomic particles comprises of electrons, protons and neutrons in any element. Each atom has its own unique atomic number and mass number. As atomic number of any element or atom is equal to the number of electrons in that atom. And a stable atom will have equal number of electrons and protons. So the atomic number will be equal to the number of protons and electrons. Then the neutron number can be obtained from mass number. As mass number is the addition of number of protons and neutrons in the nucleus, the number of neutrons can be obtained by subtracting the number of protons from mass number
So sulfur has an atomic number of 16 and mass number of 32, that means the number of electrons in sulfur is 16, the number of protons in sulfur is also 16 and the number of neutrons in sulfur is 32-16 = 16.
Similarly, Cobalt has an atomic number of 27 and mass number of 60, so the number of protons and electrons is 27, the number of neutrons is 60-27 = 33.
Also, Uranium has an atomic number of 92 and mass number of 238. So the subatomic particles in uranium is 92,92 and 146.
And the atomic number of lead is 82 and mass number is 207, then the subatomic particles in lead is 82,82 and 125.
Answer: the correct option is 1 (It ensures that the ester is uncharged and therefore insoluble in water so that the product can be filtered.)
Explanation:
Esters are formed through a process known as esterification. This involves the heating of a carboxylic acid with an alcohol while the water formed is continuously removed. In order for the reaction to occur at a maximum rate, an acidic catalyst is used. The most common acid catalysts includes:
- hydrochloric acid and
-sulfuric acid.
These catalyst needs to be neutralized in order to isolate the product. This is so because the solution begins to precipitate when the reaction mixture is neutralized.
Thus it is important neutralize the moisture in order to filter out the ester from the mixture, which otherwise will be in a dissolved state and will not be recoverable.
Answer:
I think it's 7089 because that's my answer to your questions