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2 years ago

Which colloid is more stable milk or ice cream and how do you know

Chemistry

2 answers:

ipn [44]2 years ago

8 0

Answer:

Milk is more stable than ice cream

Explanation:

The colloid formed by ice cream remains stable only at cold temperatures .

In a stable colloid, one substance does not settle out of the other. When ice cream is above its freezing point, its dispersed particles begin to move faster and start to collide with each other, and they sometimes stick together. Eventually, the particles grow so large that they can no longer remain dispersed, and they settle out of the colloid.

Marianna [84]2 years ago

7 0

The stable milk because it stable

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A concentrated solution of compound A in the same solvent was diluted from an initial volume of 2.00 mL to a fi nal volume of 25

Andre45 [30]

Answer:

The concentration of A in the concentrated solution is 0.05864

Explanation:

Given

Volume 1 = V1 = 2.00mL

Volume 2 = V2 = 25.00mL

Absorbance 1 = A1 = ?

Absorbance 2 = A2 = 0.733

Beer's law states that the concentration of a chemical solution is directly proportional to its absorbance.

i.e.

V = kA where V = Volume (Concentration)

A = Absorbance

k = Constant

Make k the subject of formula

k = V/A

V1/A1 = V2/A2

Make A1 the subject of the formula

A1 = V1 * A2/V2

Substitute the values of V1, A2 and V2

A1 = 2 * 0.733/25

A1 = 0.05864

So, the concentration of A in the concentrated solution is 0.05864

4 0

2 years ago

A container with a volume of 3.46 liters contains a gas at a pressure of 1.30 atmospheres and a temperature of 274.27 Kelvins. H

Flauer [41]

PV=nRT, n=(PV)/(RT)
(1.30)(3.46)=(n)(.0821)(274.27)
n=.199755 moles

8 0

2 years ago

Read 2 more answers

A sample of carbon dioxide gas (CO2) contains 6 x 1022 molecules. How many moles of carbon dioxide does this represent?

Agata [3.3K]

Answer:

Explanation:

1 ST METHOD

GIVEN DATA:

number of molecules=6.022×10²²molecules

Avogodro's number Na=6.022×10²²

TO FIND:

number of moles

SOLUTION:

As we knom that number of moles=number of molecules/Na

number of moles=6.022×10²²/6.022×10²²

number of moles=1 moles

2ND METHOD:

AS WE KNOW THAT A MOLE OF A SUBSTANCE CONTAINS 6.022×10²² PARTICLES OF THAT SUBATANCE SO

1MOLE OF CO2=6.022×10²²MOLECULES OF CO2

5 0

3 years ago

What mass of sulfur would have precisely 4.7x10^22 atoms of sulfur?

Svetllana [295]

Answer:

2.498g

Explanation:

First off it's important to know Avogadro's number relationship with number of moles and molar mass.

It is given as;

1 mole = 6.02 * 10^23 atoms.

A mole's weight is equal to it's molar mass. Hence the equation can be changed to;

1 mole = molar mass = 6.02 * 10^23 atoms

In this problem, molar mass of Sulphur is 32g/mol. This means 1 mole of sulphur weighs 32 g and contains 6.02 * 10^23 atoms. What mass of sulphur would then contain 4.7x10^22 of atoms?

This leads us to;

32 g = 6.02 * 10^23

x g = 4.7x10^22

Upon cross multiplication, we have;

x = (4.7x10^22 * 32) / 6.02 * 10^23

x = 24.98 * 10^-1

x = 2.498g

7 0

3 years ago

Read 2 more answers

A constant current of 0.350 A is passed through an electrolytic cell containing molten CrCl₂ for 21.7 h. What mass of Cr(s) is p

zhuklara [117]

An electrochemical cell can generate or use electrical energy. The mass of solid chromium that will be deposited on the electrochemical plate is 7.17 gm.

<h3>What is current?</h3>

Current in an electrochemical cell is the ratio of the quantity of electricity in columns and time in seconds.

Given,

Current (I) = 0.350 A

Time = 21.7 hours

Molar mass of chromium = 52.0 g/mol

First time is converted into seconds:

1 hour = 3600 seconds

21.7 hours = 76020 seconds

The quantity of electricity flowing in the electrochemical solution is calculated as:

$\begin{aligned} \rm Q & = \rm It\\\\& = 0.350 \times 76020 \\\\& = 26607\;\rm C \end{aligned}$

Electricity required for depositing 1 mole or 52.0 g chromium is calculated as:

In electrochemical solution, chromium chloride is dissociated as:

$\rm CrCl_{2} \rightarrow Cr^{2+} + 2 Cl^{-} \\\\\rm Cr^{2+} +2 e^{-} \rightarrow Cr$

Two moles of electrons are needed to deposit 52.0 g of chromium.

If, 1 electron = 96500 C

Then, 2 electron = 193000 C

The mass of chromium deposited is calculated as:

193000 C = 52 g chromium

So, 26607 C = $\dfrac{26607 \times 52}{193000} = 7.17 \;\rm gm$

Therefore, 7.17 gm of chromium is produced.

Learn more about an electrochemical cell here:

brainly.com/question/20355190

#SPJ1

4 0

1 year ago