Calculate the mass of anhydrous Na2CO3 in 25cm3 of the saturated solution at 30°C, if the solubility at this temperature is 1.8mol/dm3

Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest

What is the most common reason for matter changing its state?

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