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rosijanka [135]
2 years ago
10

Jim, Jill, Robert, and Kim each run paper chromatography on an unknown aqueous mixture. Jim gets a red band and a blue band, Jil

l gets a yellow band and a blue band, Robert gets a green band, and Kim gets a red band and a yellow band. Which student did not have more than one substance dissolved in the water?
Chemistry
1 answer:
Romashka-Z-Leto [24]2 years ago
4 0

Answer:

Robert

Explanation:

There is not more than one colour

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the relationship between the heated air particles inside a hot air balloon and the cooler air outside the balloon?
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The heated air temperature from inside the balloon more likely rises since it can't escape its trapped resulting in different density from the cooler air, the cooler air from the outside is a bit denser than the heated.
6 0
3 years ago
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Around four hundred million years after the formation of Earth, the planet's atmosphere would have been almost entirely _____.
Olegator [25]

the answer is option d

4 0
3 years ago
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Which of the following elements has the greatest atomic radius?<br> Al<br> S<br> Si<br> C
suter [353]

Answer:

The answer to your question is: Al, Si have the greatest and S, C have the smallest.

Explanation:

Atomic radius increases from right to left in the periodic table.

Atomic radius increases from the upper section to the lower section of the periodic table.

Order of the atomic radius from highest to lowest.

Al, Si, S and C

6 0
3 years ago
What I need help fast!
ozzi
The correct answer would be 3
3 0
2 years ago
During a spectrophotometric analysis of an unknown, you measure your solution's absorbance, and the value is higher than the hig
Reil [10]

Answer:

A) Dilute the unknown so that it will have an absorbance within the standard curve. Once the diluted unknown concentration is determined, the full strength concentration can be calculated if the dilution process is recorded. Beer's law only applies to dilute solutions, so diluting the unknown is better than making new standards.

Explanation:

Beer's law states that <em>absorbance is proportional to the concentrations of the absorbing species</em>. This is verified in the case of diluted solutions (0≤0.01 M) of most substances. <u>As a solution gets more concentrated, solute molecules interact between themselves because of their proximity. </u>When a molecule interacts with another, the change in their electric properties (including absorbance) is probable. That's why <u>the plot of absorbance versus concentration stops being a straight line</u>, and <u>Beer's law is no longer valid.</u>

Therefore, if the absorbance value is higher than the highest standard,  dilutions should be made. Once this concentration is determined, the full strength concentration can be calculated with the inverse of the dilution.

7 0
3 years ago
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