What is the mass of oxygen in 230 g of sulfurous acid, H2SO3?

How air particles exert a pressure on the inside of the balloon

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins