Question

Calcule a massa molecular de :

a) HCN

b)H₂SO₄

c)H₃PO₄

d)HCIO₄

e)C₆H₈O₆

f)Ca(OH)₃

Answer 1

a) HCN = (1 + 12 + 14) = 27 g/mol

b) H₂SO₄ = (1*2 + 32 + 4*16) = 98 g/mol

c) H₃PO₄  = (3*1 + 31 + 4*16) = 98 g/mol

d) HCIO₄  = (1 + 35,5 + 4*16) = 100,5 g/mol

e) C₆H₈O₆  = (6*12 + 8*1 + 6*16) = 176 g/mol

f) Ca(OH)₃ = 40 + 3*16 + 3*1 = 91 g/mol