Question

U= 2,5моль| | NH3 m-?

Answer 1

Дано:
n=2,5моль
Найти:
m=?
Решение:
m=n*M
M(NH3)-14+1*3=17 г/моль.
Подставляем.
m=2,5*17=42,5 г.
Ответ: 42,5 г.

Answer 2

It appears that the information provided is incomplete and unclear. It seems like you are trying to convey a chemical equation involving ammonia (NH3) and some unidentified components represented by "U" and "m-." However, without more context or a complete chemical equation, I cannot provide a specific answer or interpretation.

If you can provide more information or clarify the question, I'd be happy to help you with any chemistry-related inquiries you may have.