Cho dung dịch Ba(OH)2 dư vào 50ml dung dịch X chứa các ion NH4+; SO42-; NO3- đun nóng thì có 11,65g kết tủa xuất hiện và có 4,48lít khí Y thoát ra. Nồng độ mỗi muối trong dung dịch X là

Start an single atom tab. observe the decay of polonium-211. after each decay, press the reset nucleus button to watch the process again. write a description of alpha decay for po-211

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.