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2 years ago

Which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension?

2 answers:

8 0

I believe the criteria responsible for deciding whether a heterogeneous mixture is a colloid or a suspension is whether the particles remain suspended for an extended period of time. I hope it helps you.

ruslelena [56]2 years ago

5 0

It's whether the particles remain suspended for an extended period of time. hope this helps

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Please hurry!

-Dominant- [34]

Answer:

c. liquid

Explanation:

because the are not very close if the said very closely packed together it would have been a solid

7 0

3 years ago

The heat of fusion AH, of ethyl acetate (C4H802) is 10.5 kinol. Calculate the change in entropy as when 398. g of ethy, acetate

Hitman42 [59]

Answer: The entropy change of the ethyl acetate is 133. J/K

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of ethyl acetate = 398 g

Molar mass of ethyl acetate = 88.11 g/mol

Putting values in above equation, we get:

$\text{Moles of ethyl acetate}=\frac{398g}{88.11g/mol}=4.52mol$

To calculate the entropy change for different phase at same temperature, we use the equation:

$\Delta S=n\times \frac{\Delta H_{fusion}}{T}$

where,

$\Delta S$ = Entropy change = ?

n = moles of ethyl acetate = 4.52 moles

$\Delta H_{fusion}$ = enthalpy of fusion = 10.5 kJ/mol = 10500 J/mol (Conversion factor: 1 kJ = 1000 J)

T = temperature of the system = $84.0^oC=[84+273]K=357K$

Putting values in above equation, we get:

$\Delta S=\frac{4.52mol\times 10500J/mol}{357K}\\\\\Delta S=132.9J/K$

Hence, the entropy change of the ethyl acetate is 133. J/K

7 0

3 years ago

What 3 categories are elements divided

cricket20 [7]

Classification of the Elements. The next thing in our review is to classify the elements into three groups. These three groups are: metals, nonmetals, and inert gases. Let's look at where these groups are located on the periodic table and correlate them with the ability to lose and gain electrons.

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3 years ago

In a solution, what term is given to the liquid?

Jet001 [13]

Answer: solvent

solvent is A solvent is usually a liquid

7 0

2 years ago

Read 2 more answers

Which choice confirms that one air mass is being replaced by another air mass in a given area?

Sedaia [141]

Answer:

Answer is A

Explanation:

Increase in wind

7 0

2 years ago