Question

Calculați:
Mr(S O 3)
Mr(Na O H)
Mr(Ca Cl2
Mr(Fe Cl)
Mr(H2 S O 4)

Answer 1

MSO₃ = AS + 3AO = 32 + 3*16 = 80g/mol

MNaOH = ANa + AO + AH = 23 + 16 + 1 = 40g/mol

MCaCl₂ = ACa + 2ACl = 40 + 71 = 111g/mol

MFeCl₃ = AFe+ 3ACl = 56 + 3*35,5=162,5g/mol

MH₂SO₄ = 2AH + AS + 4AO = 2*1 + 32 + 64 = 98g/mol

M- masa moleculara
A-masa atomica

Answer 2

MSO3 = AS + 3AO = 32 + 3·16 = 32+48=80g/mol
MNaOH = ANa + AO + AH = 23 + 16 + 1 = 40g/mol
MCaCl2 = ACa + 2ACl = 40 + 2·35,5 = 40+71=111g/mol
MFeCl3 = AFe+ 3ACl = 56 + 3·35,5=162,5g/mol
MH2SO4 = 2AH + AS + 4AO = 2·1 + 32 + 64 = 98g/mol