Ватомном ядре содержится z протонов n нейтронов. чему ровна масса число а этого ядра?

Mя=z*mp+n*mn   mp- масса протона   mn- масса нейтрона

1) 2zno + 2hcl   → 2h₂o + 2zncl₂, реакция возможна из-за выделения воды.

zn (+2) o (-2) + h (+1) cl (-1) → h (+1) o (-2) + zn (+2) cl (-1)

2) na₂co₃ + hno₃ → h₂co₃ + nano₃, разделение кислоты на углекислый газ и воду.

na (+) co₃ (-2) + h (+1) no₃ (-) → h (+) o (-2) + co₂ (+4) + na (+) no₃ (-)

3) ag + h₂so₄   → ag₂(so₄) + h₂, вряд ли, реакция невозможна по причине нахождения вещества после h.

4) 3fe(oh)₃ + 9hcl →   3h₂o + 3fecl₃

fe (+3) oh (-1) + h (+) cl (-) → h (+) o (-2) + fe (+3) cl (-)

5) mg + h₂so₄ → mgso₄ + h₂, так как до h находится вещество.

mg (0, ибо нет соединения с другими веществами) + h (+) so₄ (-2) → mg (+2) so₄ (-2).

General questions: 1. was the aeronautical society formed in great britain? 2. did wenham's findings substantiate cayley's theories? subject questions: 3. who is credited with building the first wind tunnel? 4. what was formed in 1866 in great britain? special questions: 5. when was the aeronautical society of great britain formed? 6. what did wenham submit during the first meeting? alternative questions: 7. was f.h. wenham a marine engineer or a sea captain? 8. wenham submitted the results of his research in aerodynamics or in mathematics? tag-questions: 9. it represented the first organized activity dedicated to the research of aviation, didn't it? 10. wenham is also credited with building the first wind tunnel, isn't he?