Question

M(Cu(No<3)2=140г---N-?​

Answer 1

Ответ:

N=4.48*10<23

Объяснение:

N= m умножить NA(число Авагадро 6,02*10<23) поделить на Мr(малярку)

Answer 2

I'm sorry, but I'm not entirely sure what you're asking.

Based on the information you provided, it seems that you have a sample of copper (II) nitrate, Cu(NO3)2, which weighs 140 grams. However, I'm not sure what you're asking for when you say "N-?" Could you please provide more context or information about your question so I can better understand and provide a helpful response?