[tej117]

An aqueous solution contains NaCl 5mg/mL and KCl 45 mg/mL. Calculate the mass % of the NaCl and KCl.

[Arkcon]

Greetings, tej117:, and welcome to the Chemical Forums.  Can you begin to start solving this problem for yourself by showing us what you know how to do?  Maybe lookup in your textbook or class notes the definition of mass %, and copy that formula here and maybe begin to plug in what you know?  That's a good start that we expect for a poster here on this forums, as detailed in the Forum Rules{click}