Explanation:
The given data is:
The mass% of a solution is 7.
Mass of solution =450g
The mass of salt required can be calculated as shown below:
[tex]mass percent =(mass of solute/mass of solution )x100\\[/tex]
Substitute the given values in this formula to get the mass of solute that is salt:
[tex]mass percent =(mass of solute/mass of solution )x100\\\\7=\frac{mass of salt}{450g} x100\\=>mass of salt=7x450g /100\\mass of salt=31.5g[/tex]
Mass of salt =31.5g
Mass of solvent that is water = 450g-31.5g=418.5g
