What percentage of salts must be removed from this sample of seawater before it can be considered freshwater (dissolved salts < 500 ppm)

What is the main reason why some developing countries fear the increase the free trade policies around the world?

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

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.