help still needed with this problem. i was given an incorrect answer the answer

Question

help still needed with this problem. i was given an incorrect answer

the answer 4.88 is not correct

Crude o oil pumped out of the ground may be accompanied by formation water, a solution that contains high concentrations of NaCl and other sats y the boling point of a samp nw.trations of Naand cir r sats if the baing a sample of formation water is 2.5 above the boiling point of pure water, what is the molal molality of particles in the sample? 4.88 Your answer in molality should be about twice the temperature elevation # Try Again View

Explanation / Answer

Solution

Given data

Boiling point of solution = 2.5 C above the boiling point of pure water

Change in the boiling point (T ) = 2.5 oC

Molal boiling point constant of water Kb = 0.512 oC/m

Now lets calculate the concentration of the particles in the solution

T = Kb * m

M = molality

Now lets put the values in the formula

2.5 oC= 0.512 oC per m * m

2.5 oC /(0.512 oC per m ) = m

4.88 m = m

So we can round it to the 5.0 m

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