What mass of salt (nacl) should you add to 1.78 l of water in an ice cream maker to make a solution that freezes at -11.2 ∘c ? assume complete dissociation of the nacl and density of 1.00 g/ml for water.

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