Question

de rezolvat toate cele 3 puncte. mulțumesc dau coroana!! urgent​

Answer 1

Răspuns:

a) (91,7×56 + 5,8 × 54 + 2,2 × 57 + 0,3 × 58 ) / 100 =55.912≈56u.a.m

b) MFe=56g/mol

1 mol Fe..................56g.................6,022×10²³atomi

                           xg.......................24,088×10²³atomi

x= 24,088×10²³atomi×56/6,022×10²³atomi=224g Fe

c) MFe=56g/mol

n=m/M → m=n×M=4×56=224gFe

Explicație: