с водой полностью прореагировал кусочек натрия массой 9,2 гр.Из раствора выделили при выпаривании 12 гр гидрооксида натрия.Какова массовая доля выхода продукта реакции оттеоретически возможного?

10 в 3 степени х на 9 в 5 степени черта дроби 10в 11 степени х на 12 в читернодцатай степени!!! помогите 

сочинение

              Каким бы я хотела видеть свой город.

Задание следующее:Clare is travelling with her parents.Here is Clare`s letter to her friend.Where are they going to now? Choose the correct verb form and underline it. 

Dear Megan,

We(0)have/are having a fantastic holiday! We(1)arrived/have arrived in Paris last Sunday.We(2)stayed/have stayed at the biggest hotel.(3) Have you ever been to/Were you ever in Paris?It is a beautiful citi. I(4)have seen/saw a lot of sights.Yesterday I(5) was going/went to the Fun Park. It (6) is/was one of the best days of my life. At the moment we (7) are travelling/travel by train to Spain. We (8) are going to arrive/are arriving in Madrid tomorrow morning. I think we (9) will stay/are going to stay there for a week.

Best wishes, 

Clare