GChem Question

[SMC2UCLA2_]

What is the molality of 85% phosphoric acid, H3PO4, if the density of the solution is 1.70 g/ml?

A. 1000 * (1.70/1) * (100.0 / 15.0) * (1.70/1) * (85.0 / 100.0) * (1/98) m
B. 1000 * (1/1.70) * (100.0 / 15.0) * (1.70/1) * (85.0 / 100.0) * (1/98) m
C. 1000 * (1/1.70) * (100.0 / 15.0) * (1/1.70) * (85.0 / 100.0) * (1/98) m
D. 1000 * (1/1.70) * (15.0 / 100.0) * (1.70/1) * (85.0 / 100.0) * (1/98) m
E. 1000 * (1/1.70) * (100.0 / 15.0) * (1.70/1) * (100.0 / 85.0) * (1/98) m

the correct answer is B according to DAT achiever. Im having trouble setting this thing up.

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[seoul]

Click on the following explanation by dlink:

http://forums.studentdoctor.net/showthread.php?t=225090