Which two compounds have the same molecular formula but different chemical and physical properties?
(1) ch3ch2cl and ch3ch2br
(2) ch3chch2 and ch3ch2ch3
(3) ch3cho and ch3coch3
(4) ch3ch2oh and ch3och3

Omg imgonnafailnfiedkla use complete sentences to explain how the mass of hydrogen is conserved during cellular respiration.

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?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?