It is a mixture
Explanation:
Food coloring is able to separate into different dyes because it just a simple mixture of different color pigments.
Under a chromatogram the different colors will migrate relatively over an absorbent.
A mixture is an impure substance with the following properties:
- composition is indefinite as they are made up of two or more elements or compounds in any proportion by mass.
- They are able to retain their identities i.e physical properties are maintained.
- Their constituents reacts differently to changed conditions.
- They can easily be separated into constituent by physical methods.
learn more:
Heterogeneous mixtures brainly.com/question/1446244
#learnwithBrainly
Theoretical
yield is the amount supposedly produced by the reaction if it was complete. The
balanced chemical reaction is:<span>
</span>
<span> C2H6 + Cl2 = C2H5Cl + HCl</span>
<span>
We use the amounts given for the reactants as
the starting point of the calculations to determine the limiting reactant. We do as follows:
150 g C2H6 ( 1 mol / 30.08 g
) = 4.987 mol
205 g Cl2 ( 1 mol / 70.9 g ) = 2.891 mol
Therefore, the limiting reactant would be Cl2 since it would be consumed completely first in the reaction.
We use this for the theoretical yield.
<span>2.891 mol Cl2 ( 1 mol C2H5Cl / 1 mol Cl2 ) = </span>2.891 mol C2H5Cl (THEORETICAL YIELD)
172 g ( 1 mol / 64.52 g ) = 2.666 mol C2H5Cl (
ACTUAL YIELD)
Percent yield = 2.666 / 2.891 x 100 = 92.21%</span>
Water freezes at 0 degrees Celsius
Answer:
We know that camphor is a sublime substance and sand is not a sublime substance. Thus we can separate camphor from sand by heating the mixture slowly. The vapours of camphor should be then collected and cooled down. We would observe that solid camphor crystals will form.
Explanation:
The correct answer is (A) from 2nd to 3rd shell.
The explanation :
when a gain of energy is the shift of the electrons from a shell of low energy to the shell of high energy
and we have here 2nd shell is the shell of low energy, and 3rd shell is the shell of high energy.
∴ (A) from 2nd to 3rd shell is the correct answer.