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vovangra [49]
3 years ago
10

Imagine a drop of water in oil. If you add surfactant, explain how the surfactant molecules organize themselves around the water

drop?
Chemistry
1 answer:
Oduvanchick [21]3 years ago
4 0
If you add a surfactant in water-oil mixture, surfactant molecules would form micelles wherein the hydrophobic end of the surfactant faces inside the micelle while the hydrophilic end faces the water molecules. Inside these micelles oil particles are attached. 
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If 0.500L solution weighs 596g and contains 90.0g of oxalis acid, the concentration can be expressed as ?M, or ?(m/m)%, or ?(m/v
irinina [24]

Answer : The concentration can be expressed as, 1.99 M, or 15.1(m/m)%, or 18(m/v)%

Solution : Given,

Volume of solution = 0.5 L = 500 ml        (1 L = 1000 ml)

Mass of solution = 596 g

Mass of oxalic acid, (solute) = 90 g

Molar mass of oxalic acid = 90.03 g/mole

First we have to calculate the concentration in terms of M(molarity).

Molarity : Molarity is defined as the number of moles of solute present in one liter of solution.

Formula used : M=\frac{w_{solute}}{M_{solute}\times V_s}

where,

M = molarity of solution

w_{solute} = mass of solute(oxalic acid)

M_{solute} = molar mass of solute(oxalic acid)

V_s = volume of solution(in liters)

Now put all the given values in this formula, we get

M=\frac{90g}{90.03g/mole\times 0.5L}=1.99mole/L=1.99M

Now we have to calculate the concentration in terms of (m/m)%

(m/m)% : It is defined as the mass of solute present in mass of solution in grams.

Formula used : (m/m)\%=\frac{w_{solute}}{w_s}\times 100

where,

w_s = mass of solution

(m/m)\%=\frac{90g}{596g}\times 100=15.1%

Now we have to calculate the concentration in terms of (m/v)%

(m/v)% : It is defined as the mass of solute present in one milliliter of solution.

Formula used : (m/v)\%=\frac{w_{solute}}{V_s}\times 100

where,

w_s = mass of solution

(m/m)\%=\frac{90g}{500ml}\times 100=18%

8 0
3 years ago
Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the so
sammy [17]
The best answer among the choices is option D. New substances are being formed will best explain that this process is a chemical change. Although, it cannot be seen directly we knew that an acid and base will undergo neutralization reaction forming a salt and water. The heat given off by the reaction can be a parameter however it does not only happens for reactions. It can also happen when dissolving substances.
6 0
3 years ago
1. The Measurable physical quantity for which the fundamental measurement is duration is
Aleksandr-060686 [28]

Answer:correct answer is a enegry

Explanation:

5 0
3 years ago
How many molecules are in 13.5 g of sulfur dioxide?
vampirchik [111]
Oxygen-8×2=16, sulphur=16
1mole=6.023×10^23molecule=22.4l=32gram

32g=6.023×10^23molecule
1g=6.023×10^23÷32
13.5g=6.023×10^23÷32×13.5
=2.5×10^23 molecule
.°. there are 2.5×10^23 molecule in 13.5g of sulphur dioxide
4 0
3 years ago
Read 2 more answers
THIS IS EASY BUT FOR SOME REASON MY BRAIN IS DED PLS HELP
Mama L [17]

Answer:

Solid

Explanation:

The particles in the solid matter are held close together and in fixed particles.

6 0
3 years ago
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