The mole fraction of NaCl in an aqueous solution is 0.132. What is
the weight/weight percent of NaCl in
this solution?
Molar Mass
NaCl: 58.44 g/mol
H20: 18.016 g/mol
Hint: Remember to give your answer as a percent!

The weight/weight percent(%w/w) of NaCl in  solution : 33.03%

Given

Mole fraction of NaCl : 0.132

Required

The weight/weight percent of NaCl

Solution

1 mol solution : 0.132 mol NaCl + 0.868 mol H₂O

mass NaCl :

mass H₂O :

Total mass = 7.714 + 15.64 = 23.354 g

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

the answer is barium and copper bromide