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Yakvenalex [24]
4 years ago
7

Which statement is true about the potential energy diagram for an endothermic reaction

Chemistry
1 answer:
Vikki [24]4 years ago
7 0

Answer:

B. It starts at a higher energy value and ends at a lower energy value

Explanation:

I had this question before. I hope this answered your question.

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The vapor pressure of water is 23.76 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in water is sucrose. Calculate
MrRissso [65]

Answer : The vapor pressure of solution is 23.67 mmHg.

Solution:

As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

The formula for relative lowering of vapor pressure will be,

\frac{p^o-p_s}{p^o}=\frac{w_2M_1}{w_1M_2}

where,

p^o = vapor pressure of pure solvent  (water) = 23.76 mmHg

p_s = vapor pressure of solution= ?

w_2 = mass of solute  (sucrose) = 12.25 g

w_1 = mass of solvent  (water) = 176.3 g

M_1 = molar mass of solvent (water) = 18.02 g/mole

M_2 = molar mass of solute (sucrose) = 342.3 g/mole

Now put all the given values in this formula ,we get the vapor pressure of the solution.

\frac{23.76-p_s}{23.76}=\frac{12.25\times 18.02}{176.3\times 342.3}

p_s=23.67mmHg

Therefore, the vapor pressure of solution is 23.67 mmHg.

7 0
3 years ago
What is work and why energy is useful for work???<br>(please guys give answer)​
dexar [7]
Work is labor and energy is useful for it because you need energy to work unless you will be tired
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3 years ago
At 0.96 liters how much to fill a 15 gallon tank
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Nulceic acids are assorted with the cell memebrane<br>true or false​
Sauron [17]

Answer:

false should be the correct response.

8 0
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Wind and ocean currents do not move in straight lines; instead, they curve as they move across the planet. What is responsible f
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the Coriolis effect

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