Какой объём водорода (н.у.)выделится при растворении 10 г сплава , содержащего 40% алюминия, в гидроксиде натрия?

Формула уже дана нужно решение и пропорция.

2Al+4NaOH=2NaAlO2+H2

помогите пожайлуста!!!!    на сколько произведение чисел 308 и  14 больше произведения   38 и 14?

Восстанови письмо, вставив пропущенные слова. _______________ beautiful, write, in the country, behind, mountains, swim, river _______________ Dear Alex, Thank you for your letter. I am Vova. I am from Russia. My country is large and___. There are many cities and towns in Russia. But I live____. I live with my mum and dad. Our house isn't big. There is a green garden with apple trees and flowers ___ my house. There is a river next to the forest. My friends and I ___ there in summer. There is an old bridge over the___. We've got a cow, five sheep, a horse, a dog and a cat. I like to read books about seas, oceans, ___ and deserts. ___ me about your country and your town, please. Your pen friend, Vova

Как вы относитесь к рассуждениям Гете ?