the fase ins. You heve 15 ion due to L of 0.30 M Noh is m 60c to 40 c, the groms

Question

the fase ins. You heve 15 ion due to L of 0.30 M Noh is m 60c to 40 c, the groms of You re to determine the formula and the melecular mass for an onganic campound from the folo 500 g af the organic sold daselved in 1000s benzene (CH.) compound is 46 TL nitrogen. 667 Hydrogen 2671 and the remainder is carbon rygen 276.63 The being temperature Preben Ene 30 5.2 K a Determine the molecakar mass of the organic mold. sss s: M (215.537 x 100 s 5 Mass 100-69 percent 330 a. 8 38 28 to nto rs T 10.75 1.344 Determine the molecular formula of the selid. 19.33 G7 Determine the male fraction of the organic solid in The solution 0.119 0851 9 t 1.28 d If the density of this solution is 089B99/mL colculate the malarity of the solution 0.89 89 1000 mL

Explanation / Answer

To determine the molecular mass use the following expression:

          dT = ikm

here dT = 82.3 C-80.2 C = 2.1 C

For all organic molecules i=1

Now calculate the molality

          dT = ikm

          m = dT / ik

     = 2.1 / 1*2.53

          = 0.83 mole /Kgsolvent

Here solvent is benzene = 100.0 g or 0.100 kg

Solute = 5.00 g

Therefore;

5.00 g solute /0.100 kg solvent = 50.0 g/ kg

So,

50.0 g /0.83 mol = 60 g/ mole

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