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pshichka [43]
3 years ago
8

Someone please help me

Chemistry
1 answer:
Ymorist [56]3 years ago
7 0
The correct answer is B.14.007
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A plant extract can be obtained with organic solvents such as acetone or ethyl alcohol, and is composed of plant pigments such a
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Here's what I get  

Explanation:

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Many schools use paper chromatography, because paper is cheap.

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3 years ago
What is the mass in grams of 6.12 x 10^20 molecules of caffeine, C8H10N4O2?
baherus [9]
6,02*10^{23} \ \ \ \ \ \ \rightarrow \ \ \ \ \ 194,2g\\
6,12 * 10^{20} \ \ \ \ \ \ \rightarrow \ \ \ \ \ x\\\\
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3 years ago
calculate the mass required to prepare 2.5 L of 1.0 M NaOH solution. Given that the molar mass for NaOH is 40 g/mol.
Helen [10]

Answer:

The required mass to prepare 2.5 L of 1.0 M NaOH solution is 100 g

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