The weight is the mass of an object, the volume is usually used to measure the amount of liquid in something.
Ax+by=c
x=2 y=1 2+1=3
2x+y=3.
Answer: 5
Step-by-step explanation:
In getting the concentration of the substance that has an aqueous solution of a fluoride of 0.039M, the density doesn't matter anymore you just have to multiply its solution to its molar mass that would came up to 0.7409g and then do the conversion that could lead to a 0.07409%(m/m). I hope you are satisfied with my answer and feel free to ask for more