Homework 1 Read the text. Write five questions about Asadbek. e.g. Where did Asadbek study before coming to Tashkent?
A young conductor from Tashkent, a 10-year-old Asadbek Ayubjanov
Asadbek is a third-grade student of the Russia, which consists of 90 orchestra mem-
Republican Specialized Music Academic bers, and the Vladimir Spivakov's orchestra
Lyceum named after Uspensky. He is the "Virtuosos of Moscow".
youngest conductor in Uzbekistan and one Asadbek's teacher Vladimir Neymer sent a
of the youngest in the world
video of Asadbek conducting an orchestra to
The talented boy was noticed in Termez Vladimir Spivakov. After that, Asadbek was
Music School. He was invited to study to invited to perform in famous concert halls
Tashkent. Vladimir Neymer, a professor at Asadbek wants to become a famous violinist
the State Conservatoire, teaches him the art or conductor. He wants to travel around the
world, see different countries and cities, and
of conducting
The young conductor earlier conducted learn a lot of new things.
the orchestra of the Ministry of Defence of
При нейтрализации гидроксида натрия серной кислотой появляется средняя соль сульфат натрия и вода. Реакция при н.у. протекает интенсивно и до конца. Уравнение реакции можно записать в виде:
Объяснение:
2 NaOH + H2SO4 = Na2SO4 + H2O
Молярная масса веществ:
M(NaOH) = 40 г/моль;
M(Na2SO4) =142 г/моль.
Составим пропорцию по уравнению реакции и вычислим массу соли.
12 г NaOH подходит Х г Na2SO4, как
2 * 40 г/моль NaOH соответствует 142 г/моль Na2SO4.
Х = 12 * 142 / (2 * 40)= 21,3 г сульфата натрия.
ответ: масса сульфата натрия 21,3 г.