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3 years ago

Stacy runs a paper chromatography experiment using the same ink, but two different solvents.

Chemistry

2 answers:

Furkat [3]3 years ago

5 0

Answer: Option C

Explanation:

Chromatography can be defined as the techniques which can be used to separate the mixture into different components. The mixture is dissolved fluid known as mobile phase.

The solid or liquid phase on which the materials are separated is known as the stationary phase.

If the solvent does not carries the ink from the original point to another point then the solvent B is not a good mobile phase and there is a strong interaction between the stationary and mobile phase.

Hence, the correct answer is option C

Pie3 years ago

4 0

Answer:

Did you ever find the answer??

Explanation:

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3 years ago

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The reaction 2HgO (s)→2Hg (I)+O2 (g) has a percent yield of 50%. You want to produce 100 g of Hg.

nevsk [136]

The mass of HgO needed for the reaction is 216 g

The correct answer to the question is Option C. 216 g

We'll begin by calculating the theoretical yield of Hg.

Actual yield of Hg = 100 g

Percentage yield = 50%

Theoretical yield of Hg =?

Theoretical yield = Actual yield / percentage yield

Theoretical yield = 100 / 50%

Theoretical yield of Hg = 200 g

Finally, we shall determine the mass of HgO needed for the reaction.

2HgO → 2Hg + O₂

Molar mass of HgO = 201 + 16 = 217 g/mol

Mass of HgO from the balanced equation = 2 × 217 = 434 g

Molar mass of Hg = 201 g/mol

Mass of Hg from the balanced equation = 2 × 201 = 402 g

From the balanced equation above,

402 g of Hg were produced from 434 g of HgO.

Therefore

200 g of Hg will be produce by = (200 × 434) / 402 = 216 g of HgO.

Thus, 216 g of HgO is needed for the reaction.

Learn more about stoichiometry:

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3 years ago

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4 years ago

Physical or chemical change: mixing salt and garlic together.

blondinia [14]

Answer: physical

Explanation:

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