SCRIE FORMULA ŞI DENUMEŞTE SUBSTANŢA

10. 1 atom azot şi 3 atomi de
hidrogen
11. 2 atomi de hidrogen, 1 atom de cabon şi 3 atomi de
oxigen

Totul este greu înainte de

a deveni ușor

12. 1 atom de carbon şi 2 atomi de oxigen

13. 1 atom de calciu şi 1 grupare
carbonat
14. Pb (II) și 1 grupare carbonat
15. Co (II) și o grupare fosfat
16. Arsen și un radical sulfură

In which direction will the following reaction go if the standard reduction potentials are 0.80 v for ag/ag+ and –0.44 v for fe/fe2+? ag+ + fe → ag + fe2+ a.)forward b.)the reaction cannot occur. c.) not enough information is given. d.) reverse

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Which best describes how johannes kepler developed his laws of planetary motion