What are the options? based on the volume it can differ but in general pipettes and graduated cylinder are the best. <span />
In 1911, Rutherford performed experiment to determine the structure on atom
0.0597
Mole fraction NH3 = moles NH3 / total moles in solution
moles NH3 = mass / molar mass
= 15.0 g / 17.034 g/mol
= 0.88059 moles
moles H2O = 250 g / 18.016 g/mol
= 13.8766 mol
total moles = 0.88059 + 13.8766
= 14.757 mol
fole fraction NH3 = 0.88059 / 14.757
= 0.0597
