They wants to measure the pH of a sample of drinking water as accurately as possible

A150 liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°c without change the temperature a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres the volume of the gas

The chemical formula for carbonic acid, a compound used in carbonated drinks, is h2co3. assume that these symbols represent the three elements of this compound:

19. determine the final state and its temperature when 150.0 kj of heat are added to 50.0 g of water at 20 ºc. (specific heat of water = 4.184 j/g ºc; specific heat of steam = 1.99 j/g • ºc; ∆hfus (h2o) = 6.01 kj/mol; ∆hvap (h2o) = 40.79 kj/mol). (5 points)