I believe the answer is Exothermic
Atomic mass carbon = 12.0 amu
1 mole C ---------- 12.0 g
?? moles C ------- 6.8 g
moles C = 6.8 x 1 / 12.0
moles C = 6.8 / 12.0
=> 0.567 moles
Explanation:
More is the intermolecular forces present between the molecules of a substance more will be the boiling point of the substance.
Since, water is able to form hydrogen bonding and it also have dipole-dipole interaction as these are stronger than the forces present in ammonia. Hence, boiling point of water is greater than the boiling point of .
In , there are only dispersion forces present in it and these forces are weakest intermolecular forces.
As a result, the enthalpies of vaporization of the following substances increase in the order .
Answer:
See explanation
Explanation:
On a certain day, our teacher came to class with a container having some salt, some sand and a few pieces of iron in it. She was about to introduce a lesson on separation of mixtures.
Then she held a large bar magnet close to the mixture and shook it, the pieces of iron were attracted by the magnet and separated from the mixture.
Next, she poured some water into the mixture and the salt dissolved. She got a filter paper and separated the solution from the sand.
Then she heated the solution to dryness in an open crucible and the salt was recovered.
Answer:
The correct answer is - nuclear fission.
Explanation:
In the given diagram, the reaction is a graphical representation of the nuclear fission of one nucleus of Uranium 235 into two nuclei of Kr with three neutrons that leads to a chain reaction and releases a huge amount of energy and grow out of control.
With every fission, there are two neutrons emitted which results in splitting more nucleus into two nuclei and keep on growing and never die out. The amount of energy also keeps on growing with an increase in the reactions and fission. This reaction is used to generate electricity and nuclear weapons.