có 1 hh gồm 5 kim loại al mg fe cu ag dùng pphh để tách riêng từng chất để khối lượng không đổi . Viết PTHH xảy ra trong lúc tách

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.