Technically I don't know because we need the volume of the solution. I assume the problem maker wants that 92.5 cc (you meant cm^3 I'm sure) to be the volume of the solution. One mole of a gas at STP will occupy 22.4L; therefore, moles HCl gas = 550 cc/22,400 cc.
Then moles HCl/L soln = M
what is molar concentration of a solution obtained by dissolving 560cm of hydrogen chloride gas at s.t.p in 92.5cm of water
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