Since customers prefer a lower concentration of lemon juice, Mario measures out 3 grams (g) of lemon juice and adds it to the 500 milliliters (mL) of water. What is the concentration of lemon juice in the water?
I guess lemon juice is citric acid (M=192.123g/mol); n=m/M, m is 3 grams, so n=3g/192.123g/mol, n=0.016mol Concentration is c=n/V, V is 500ml=0.5l, so c=0.016/0.5l is 0.032mol/l
