describe the" fear appeal" and how it's used in public messaging. Give an example or create your own public health message using
1 answer:
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Answer:
is the total pressure of the tank.
Explanation:
Partial pressures of nitrogen =
Partial pressure of oxygen =
Total pressure of gases in the tank = P
Applying Dalton's law of partial pressures :
is the total pressure of the tank.
Ok to answer this question we firsst need to fin the number of mol of Urea (CH4N2O). to do this we simply :
1 mol of urea =15/60.055 = 0.25mol
therefore 200g of water contain 0.25mol
the next step is to determine the malality of our solution in 200g of water, to do this we say:
200 g = 1Kg/1000g = 0.2kg
therefor 0.25mol/0.2Kg = 1.25mol/kg
and from the equation:
we know that i = 1
we are given Kf
b is the molality that we just calculated
therefore;
the solutions freezing point is -2.325°C
