Why do olive oil and vinegar (a water-based solution) tend to separate in salad dressing? will added salt dissolve in the oil or in the vinegar? explain your answer?

Answers

Answer 1

Answer:

Vinegar (acetic acid solution) is a polar substance, whereas olive oil is non polar in nature. Like dissolves like. A polar substance cannot dissolve in a non polar compound. Therefore, vinegar which is polar is not soluble in olive oil, a non polar substance. Hence, in a salad dressing olive oil separates out from vinegar.

Added salt would dissolve in vinegar solution as salt, a polar substance which is chemically, sodium chloride is an ionic substance. It can dissolve in the polar vinegar solution but not olive oil.

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Container A contains 10.0 g of liquid isopropyl alcohol which has a latent heat of vaporization of 732 J/g. Container B contains 10.0 g of liquid ethanol which has a latent heat of vaporization of 841 J/g. Both containers are brought to their respective freezing points. Heat is then removed from both containers at the same rate. The container whose contents will freeze first is:

Answers

By definition, the latent heat associated with melting a solid or freezing a liquid is called the heat of fusion.

Container A has a latent heat of vaporization of 732 J/g.
Container B has a latent heat of vaporization of 841 J/g.

Latent heat of vaporization refers to the vaporizing a liquid or a solid or condensing a vapour.

This means that Container A boils first because it has lower latent heat of vaporization.

As you heat a solid, turning it into a gas, the kinetic energy of the molecules are increased to a point where there are no forces of attraction between the molecules. Thus, Container B will freeze faster than Container A

2. The energy of a photon that has a wavelength of 12.3 nm is _______ J.A) 2.72 x 10^-50
B) 1.62 x 10^-17
C) 4.42 x 10^-23
D) 1.99 x 10^-25
E) 1.51 x 10^-17

Answers

I think it is e sorry if I’m wrong

Linolenic acid (C18H30O2) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C18H30O2 + 3H2 --->C18H36O2 What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Answers

1.998 ml of hydrogen gas volume is is required to react with 10.5 g of linolenic acid in this reaction.

Explanation:

Data given:

mass of linolenic acid is given = 10.5 grams

atomic mass of linoleinic acid = 278.43 grams/mole

volume of hydrogen required at STP = ?

Balance chemical reaction:

C18H30O2 + 3H2 --->C18H36O2

moles of linoleinic acid given = $(mass)/(atomic mass of 1 mole)$

putting the values in the equation:

moles of linoleinic acid = $(10.5)/(278.43)$

= 0.037 moles

from the balanced equation:

1 mole of linoleinic acid reacts with 3 moles of hydrogen

so, 0.037 moles will react with x moles of hydrogen gas

$(1)/(3)$ = $(0.037)/(x)$

x = 0.111 moles of water

volume or mass = atomic mass x number of moles

volume of hydrogen gas= 1.998 ml

Final answer:

Around 2.53 liters of hydrogen gas, at STP, is required to fully hydrogenate 10.5 g linolenic acid to stearic acid.

Explanation:

To solve this problem, we first need to find the molar mass of linolenic acid (C18H30O2). The molar mass is calculated by adding the molar masses of all the atoms in the molecule: (18*12.01) + (30*1.01) + (2*16.00) = 278.44 g/mol. Next, we calculate the number of moles of the linolenic acid we have: 10.5 g / 278.44 g/mol = 0.0377 mol. According to the balanced chemical equation, we need 3 mol of hydrogen per mol of Linolenic acid, so we need 0.0377 mol * 3 = 0.1131 mol of hydrogen gas. Finally, at STP, 1 mole of any type of gas occupies a volume of roughly 22.4 L, so the volume required is 0.1131 mol * 22.4 L/mol = 2.53 L.

Learn more about Stoichiometry here:

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Which of the following statements is true about an endergonic reaction? ∆G is positive ∆G is negative ∆S is negative

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The answer is the first option, ∆G is positive. Endergonic reaction is a chemical reaction where the Gibbs free of energy is positive and there is abosrption of energy. It is a nonspontaneous reaction or unfavorable reaction.

Every chlorine atom has

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an atomic number of 17

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With the help of a reaction show that zinc is more reactive than iron.

Answers

$3Zn+2Fe^(3+)\rightarrow 3Zn^(2+)+2Fe$

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