2 moli .. n moli .... a g
2Na + Cl2 --> 2NaCl
2 .......... 1 ........ 2 x 58,5 g/mol
a)
=> a = 2 x 2 x58,5 / 2 = 117 g NaCl
b)
=> n = 1 mol Cl2
c) n = nr moli = N / NA, unde NA = nr lui Avogadro = 6,022 x 10la23
=> N = n x NA = 1 x 6,022 x 10la23 = 6,022 x 10la23 molecule Cl2