<span>Separating mixtures can be
done in many ways. One of these methods is the physical methods which include,
filtration, crystallization, distillation, and chromatography.
Since mixtures come in a lot of forms and
many phases, some of them cannot be separated through the first physical methods.
The methods of separating mixtures depend on the kind of mixture. Other common separation methods include
fractional distillation which is similar to simple distillation method, magnetism,
which is ideal for mixtures whose one
part has magnetic properties and separating funnel, an ideal technique used to
separate immiscible liquids..</span>
J.J. Thomson discovered the electron 1897
Answer:
n = 3
Explanation:
Given the formula for the transition energy of an atom with 1 electron:
For the H transition n=5 to n=2:
Then we solve for nf with Z=2 (Helium)
Is near 3, actually the energy of the transitions are:
H (5⇒2) = -2.85 eV = 434 nm (Dark blue)
He (4⇒3) = -2.64 eV = 469 nm (Light blue)
I thought it was cool to see the actual colors. Included them.
Answer: 2 atoms
Explanation: A molecular formula of the compound carbon dioxide is CO 2 . One molecule of carbon dioxide consists of 1 atom of carbon and 2 atoms of oxygen.
Answer:
Option B
Explanation:
The name of the molecule is;
1,1,1,3,3,3-Hexachloropropanone
Now, we can see that it contains propanone which is also called acetone. So it will have a double bond with Carbon(C) and Oxygen (O).
Option B has that double bond between C and O that indicates it propanone or acetone.
Thus, it is the correct option.
