Question

calculeaza masa de saruri obtinuta din reactia Ba + Cl2 =BaCl2,dacă se consuma 4 moli de Cl.
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Answer 1

Răspuns:

1mol.......1mol

Ba + Cl2 => BaCl2

4moli.....x moli

x= 4×1/1=4moli BaCl2

MCl2 =2×35,5=71g/mol

MBaCl2=137+2×35,5=208g/mol

n=m/M

m=n×M

m=4×71=284g

71g............208g

Ba + Cl2 => BaCl2

284g........yg

y= 284×208/71=calculează