Question

Va rog rapid!!!!!!!!!!!!!

Answer 1

Răspuns:

2.M(CuCl2)=64+35×2=134g/mol

M(K2S)=39×2+32=110g/mol

M(H3PO4)=1×3+31+16×4=98g/mol

M(Mg(OH)2)=24(16+1×2)=432

3.a)M(K2O)=39×2+16=94g/mol

n=m:M

n(K2O)=282g:94g/mol=3mol

b)M(MgCl2)=24+35×2=94g/mol

n(MgCl2)=95g:94g/mol=1,01mol

c)M(NH3)=14+1×3=17g/mol

n(NH3)=68g:17g/mol=4mol