Once you have that: the start is pretty simple. Identify your question:
?=g(Kcl)/1000ml now you know where to start the conversion. Take the figure on the bottom.
1000ml/1 times(1Tbs/15ml) (5mEq/1 Tbs)
See, you’re doing a conversion of ml to g of Kcl. Set it up as a cross multiplication problem where you are always taking what’s on top of the previous and putting it onto the bottom of the next. That eliminates the terms as they cancel each other out.
You know something about ml – there are 15 in one Tbs. You know something about Tbs – it needs to contain 5 mEq (Kcl). Here is where you can’t complete the problem. You know nothing about how many mEq (Kcl) are in 1 gram.
If you did know that say there were 30 mEq in one gram, you could finish.
(1000/1)(1Tbs/15 ml)(5mEq/1 Tbs)(1g//30mEq))
Then you simply multiply across: 1000*5/15*30 = 166.66g of Kcl