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kiruha [24]
3 years ago
15

Why is the spot of drink placed above the water line at the start of the process

Chemistry
2 answers:
Elena L [17]3 years ago
4 0
This is the answer. Hope this helps!

Klio2033 [76]3 years ago
3 0

Answer: The solvent gives extra energy to pull up the sample and the sample will also dissolve in the solvent. That's why as precautionary measure start line should stay above the solvent in chromatography.The baseline must be above the solvent level in the TLC chamber, so the solvent does not dilute to samples so much that they dissolve.

Explanation:

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What is the mass of 4.40 moles of magnesium chloride, MgCl2?
Darya [45]
Since the number of moles of a substance is the mass divided by the molar mass of the substance, we can just simply multiply the molar mass of magnesium chloride by the number of moles, which is 4.40 in this case.

To find the molar mass, refer to the periodic table for the relative atomic mass of Mg and Cl and add them together. Since there’s 2 chloride ions in MgCl2, double the relative atomic mass of Cl when adding.

24.31 + 35.45x2
=95.21

Now just multiply 95.21 to 4.40mol, which you’ll get 418.9g (corrected to 3 significant figures)
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3 years ago
What is the definition of Indirect Proportion Graph?
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Explanation:

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4 years ago
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hope this helps

5 0
2 years ago
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frosja888 [35]
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