Whenever two measurements are equal or equivalent a ratio of these two measurements will equal what?

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

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

How many moles are equal to 2.4×10^23 formula units of sodium chloride