Question

a 7.50 by mass aqueous ammonia, NH3,solution has a density of 0.973 g/mol. Calculate molality and molarity? Need your ASAP please :(
7.50 what? percent? Is that 7.50% by mass NH3 solution.
Also, is that a density of 0.973 g/mL; surely not 0.970 g/mol. If so, per mols of what?

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