Answer: In the gas phase using the example of the perfume in the air, the air very slowly separates the molecules of the perfume which allow them to spread to the olfactory system (sense of smell) to the individuals in the area. In this experiment, the particles moved very slow and we know this because it took a long time for the perfume smell to reach the back of the room. In the liquid phase using the example of the food dye in the cold and hot water, the food dye diffused a lot faster in the hot water because the particles were moving a lot faster and colliding more often and at an increased rate compared to the cold water where the food dye took a lot longer to diffuse in the water and the particle motion and collision was a lot slower and a lot less frequent
Explanation:
Looked it up.
Option no. 2 subtracting the atomic number from the mass number
Example: Zn - 65 atomic weight or mass/mass number
30 atomic number
65-30 = 35 number of neutrons
The answer is false. there is still temperature changes and different seasons. hope this helps< 3
Answer:
True water is wet because when something is wet in this case it's water it has water on it at a molecular level. Water molecules are bonded on top of each other so it's wet.
Answer:
Here's what I get.
Explanation:
At the end of the reaction you will have a solution of the alcohol in THF.
The microdistillation procedure will vary, depending on the specific apparatus you are using, but here is a typical procedure.
- Transfer the solution to a conical vial.
- Add a boiling stone.
- Attach a Hickman head (shown below) and condenser.
- Place the assembly in in the appropriate hole of an aluminium block on top of a hotplate stirrer.
- Begin stirring and heating at a low level so the THF (bp 63 °C) can distill slowly.
- Use a Pasteur pipet to withdraw the THF as needed.
- When all the THF has been removed, raise the temperature of the Al block and distill the alcohol (bp 143 °C).