The concentration (M) of HCl in a solution prepared by dissolving 5.5 g of HCl in 200 g of C2H6O

Question

is ?????? M. The density of the solution is 0.79 g/mL.
A) 21 B) 0.93 C) 6.0 × 10-4 D) 1.72 E) 0.58

Answer 1

M = mols/L
moles HCl = 5.5/molar mass HCl = ??
volume = mass of soln/density
mass of soln = 5.5 + 200 = 200.5 g.

Answer 2

0.75