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Marina CMI [18]
3 years ago
12

Which phrases describe a model in science? Check all that apply.​

Chemistry
1 answer:
AfilCa [17]3 years ago
4 0
I would say the first 3
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Positive Deviation from Raoult's Law occurs when the vapour pressure of component is greater than what is expected in Raoult's L
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Answer:

All of the above.

Explanation:

In positive deviation from Raoult's  Law occur when the vapour pressure of components is greater than what is expected value in Raoult's law.

When a solution is non ideal then it shows positive or negative deviation.

Let two solutions A and B to form non- ideal solutions.let the vapour pressure  of component A is P_A and vapour pressure of component B is P_B.

P^0_A= Vapour pressure of component A in pure form

P^0_B= Vapour pressure of component B in pure form

x_A=Mole fraction of component A

x_B==Mole fraction of component B

The interaction between A- B is less than the interaction A- A and B-B interaction.Therefore, the escaping tendency of liquid molecules in mixture is greater than the escaping tendency in pure form.Hence, the vapour pressure of a mixture is greater than the initial value of vapour pressure.

P_A >P^0_A\cdot x_A,P_B>P^0_B\cdot x_B

Therefore, P_A+P_B >P^0_A\cdot x_A+P^0_B \cdot x_B

Therefore, the enthalpy of mixing is greater than zero and change in volume is greater than zero.

Hence, option a,b,c and d are true.

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3 years ago
Does the following compound contain a polyatomic ion? Na2SO4<br> Yes<br> No
seropon [69]
The answer is yes I believe so.
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2 years ago
The screenshts below
ICE Princess25 [194]

Answer:

yes so for example one

Explanation:

yeah so

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What is one of the main features of karst topography?
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Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions.

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Elastic Potential Energy

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