Calculate [H3O+] of the following polyprotic acid solution: 0.140 M H3C6H5O7. Ka1 H3C6H5O7 7.4×10−4
Ka2 H3C6H5O7 1.7×10−5
Ka3 H3C6H5O7 4.0×10−7

pls show work

Which of these will change if the air in aclosed bottle is heated? abcdthe mass of the airthe composition of the airthe air pressure in the bottlethe number of air molecules in the bottle

Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]