Question

cate grame de calciu sunt continute in 0,1 moli de atomi de calciu dar in 5 kmoli de atomi de calci

Answer 1

Masa molara calciu-40g/mol
daca intr-un mol.....40g calciu
in 0,1 moli .....x g
=>x=40*0,1/1=4g

5 kmoli=5000 moli
daca intr-un mol.....40g calciu
in 5000 moli.....x g
=>x=5000*40=200000g/200Kg