Answer;
Fractional distillation
Explanation;
-Fractional distillation is one of the method that is used to separate mixtures. It is used for the separation of miscible liquids, for example water and alcohol.
-Fractional distillation is a distillation method that is used to separate liquids that dissolve in each other. It involves separating the components of a mixture by repeated distillations and condensations.
-The components in the mixture being separated by this method normally have different but close boiling points. For example a mixture of alcohol and water, they have different but close boiling points, thus during distillation alcohol condenses out as the first fraction followed by water.
Answer:
answers:
1.b
2.d
3.b
4. c
5.c
6.d
7.c
Explanation:
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19. place moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added.
24. steam
Given:
128g sample ofwater
2808J of heatenergy
Required:
Change intemperature
Solution:
This can be solvedthrough the equation H = mCpTwhere H is the heat, m is the mass, Cp is the specific heat and T is the change in temperature.
The specific heatof the water is 4.18 J/g-K
Plugging in thevalues into the equation
H = mCpT
2808J = (128g)(4.18 J/g-K) T
T= 5.25 K
0.50 moles solute
1.0 mole solute
2.0 moles solute
Answer : The correct option is, 1.0 mole
Explanation : Given,
Molarity of solution = 2.0 mole/L
Volume of solution = 0.50 L
Molarity : It is defined as the number of moles of solute present in one liter of solution.
Formula used :
Now put all the given values in the above formula, we get the moles of the solute.
Therefore, the number of moles of solute dissolved in the solution will be, 1.0 mole
2. 8.92 x 10^1 m^2
3. 8.92 x 10^2
4. 8.9 x 10^3 m^2
B. Salinity
C. Soil depth
D. Sunlight
E. Temperature