The mole fraction of naci in an aqueous soultion is .132 how many moles of naci are resent in 1 mole of this soultion molar mass
naci: 58.44 g/mol
H2o:18.016 g/mol

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost