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M2O is an oxide of metal M. Upon heating, M2Odecomposes to give M and oxygen only.a) Suggest a method for testing oxygen, and state the expected observation.b) In an experiment, 3.48 g of M2O completely decomposes to give 3.24 g of M. Calculate the relative atomic mass of M.c) Explain whether M can... 顯示更多 M2O is an oxide of metal M. Upon heating, M2Odecomposes to give M and oxygen only. a) Suggest a method for testing oxygen, and state the expected observation. b) In an experiment, 3.48 g of M2O completely decomposes to give 3.24 g of M. Calculate the relative atomic mass of M. c) Explain whether M can react with dilute hydrochloric acid. How can I get the answer? Thanks!

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M2O is an oxide of metal M. Upon heating, M2Odecomposes to give M and oxygen only. a) Suggest a method for testing oxygen, and state the expected observation. b) In an experiment, 3.48 g of M2O completely decomposes to give 3.24 g of M. Calculate the relative atomic mass of M. c) Explain whether M can react with dilute hydrochloric acid. a) Test it with a glowing splint. Oxygen can relight the glowing splint. b) Let y be the relative atomic mass of M. Mole ratio M : O in M2O is 3.24/y : (3.48 - 3.24)/16 = 2 : 1 3.24/y = (0.24/16) x 2 3.24/y = 0.03 y = 3.24/0.03 The relative atomic mass of M, y = 108 c) No. M2O decomposes on heating. It can be deducted that M is very unreactive. Since M is less reactive than hydrogen, M cannot displace hydrogen from hydrochloric acid.

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