Question

You have a solution that contains 12.0 g of NaCl in 50.0 g of water. Calculate the NaCl concentration in units of...


mass percent and mole fraction

would the mole fraction be
12/12+50=.1935
no.
What you have calculated as mole fraction actually is mass fraction. Multiply that by 100 to get 19.35% for mass percent.

mole fraction is mols NaCl/total mols.
mols NaCl = 12/molar mass NaCl = ?
mols H2O = 50/molar mass H2O = ?

Related Questions

a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that densi... a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that densi... James is cooking pasta and adds 1.40 g of NaCl (NaCl = 58.5 g/mol) to 75.6 g of water, in which the...