Какое из веществ,формулы которых приведены ниже,является основанием?
1)H2CO3
2)Fe(OH)2
3)CH3COOH
4)CrPO4

Твір на тему Суботник,будь ласка допоможіть дуже срочно потрібно?твір повинен бути на 2 сторінки,дякую)

Вставить слова в текст

Dmitri Mendeleev is a great Russian scientist of the 19th century. He _____ as a great chemist who _____ the periodic classification of the elements Dmitri Mendeleev was born in Tobolsk in 1834.At school,Dmitri_____ in mathematics,physics,and geography but was not good at languages.In 1855 he graduated from the Pedagogical Institute in St Petersburg with a goid medal for his____.In 1856 , he_____in chemistry. Dmitri Mendeleev's contribution to the world's science was_____. He was the first____the dependence of the qualities of the elements on their atomic weight.He forecast that the gaps in the table of elements would be filled in by elements which______yet.Dmitri Mendeleev was greatly honoured as a _____ of academies in many countries.Element No 101 _____ him. It is called Mendelevium.

Слова:

Achievement
create
enormous
member
name after
not discover
receive a degree
research
succeed

Мини-сочинение на тему "Это родина моя"