Question

VA ROG URGENT!! DAU COROANA SI 30 DE PUNCTE!!
Calculeaza numarul de moli din: a) 32g NaOH
b) 14,4 kg CuSO4
c) 1,8L H2O
Papa=1kg/l

Answer 1

Răspuns:a) 32g NaOH

v=m(g)/miu(g/mol)

miu=39.997(40) g/mol

v=32g/40 g/mol

v=32/40 mol

v=0.8 moli

b)14.4 kg CuSO4

v=m(g)/miu(g/mol)

miu= 160g/mol

v=14400/160

v=90moli

c)1.8 L H2O

1.8L =1.8kg =1800g

Miu=18

v=1800/18=100 moli