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finlep [7]
1 year ago
8

nonpolar aromatic compounds were separated by hplc on an octadecyl silyl (c18) bonded phase. the eluent was 65 vol% methanol in

water. how would the retention times be affected if 90% methanol were used instead?
Chemistry
1 answer:
Alika [10]1 year ago
4 0

Retention times will increase if 90% methanol were used instead of 65%. The amount of solvents completely decides the elution of compounds in HPLC.

<h3>How is the retention and elution affected in the HPLC?</h3>

The elution order of solutes in HPLC is governed by the polarity. For a normal-phase separation, solute of lower polarity spends less time in the polar stationary phase and elutes before a solute that is more polar.

Polar compounds in the mixture passing through the column will be adsorbed more strongly to the polar silica than nonpolar compounds, which passes more quickly through the column and will be eluted quicker than polar ones.

To know more about HPLC, refer

brainly.com/question/11968966

#SPJ4

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A mixture of 1.20 mols He, 2.40 mols Ne, 4.80 mols Kr, and 0.60 mols Ar has a total pressure of 600.0 mm Hg. What is the partial
Juliette [100K]

Answer: The partial pressure of the Kr is 320 mm Hg.

Explanation:

According to Raoult's Law , the partial pressure of each component in the solution is equal to the total pressure multiplied by its mole fraction. It is mathematically expressed as

p_A=x_A\times P_{total}

where, p_A = partial pressure of component A

x_A = mole fraction of A

P_{total} = total pressure

mole fraction of Krypton = \frac{\text {Moles of Kr}}{\text {total moles}}=\frac{4.80}{1.20+2.40+4.80+0.60}=0.53

p_{Kr}=0.53\times 600mmHg=320mmHg

Thus partial pressure of the Kr is 320 mm Hg

8 0
3 years ago
Determine the molar mass of H2O2 (the solute) in a 1.5M aqueous solution of H2O2
Lera25 [3.4K]

Answer:

The molar mass of  H₂O₂ (the solute) in the aqueous solution of

H₂O₂ is 51 g

Explanation:

Given;

H₂O₂ compound

Concentration of aqueous solution of H₂O₂ = 1.5M

The molecular mass of H₂O₂ = (1 x 2) + (16 x 2) = 34 g/mol

Concentration(M) = \frac{Reacting \ mass \ (g)}{Molar \ mass \ (g/m)}

Reacting mass (g) = Concentration x Molar mass

Reacting mass (g) = 1.5 x 34

Reacting mass (g) = 51 g

Therefore, the molar mass of  H₂O₂ (the solute) in the aqueous solution of

H₂O₂ is 51 g

3 0
4 years ago
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Amanda [17]
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3 years ago
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Paladinen [302]

Answer: THE ANSWER IS D

Explanation:

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A, B, AND C ARE ALL ALCOHOLS, SO THE ANSWER IS D

6 0
3 years ago
Please help I will give brainliest!!!
anyanavicka [17]
Need a picture for reference
7 0
3 years ago
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