Question

3×6,023×10 la puterea 23 de atomi vor fi cuprinsi in ...g Na; ...gF si .........g O

Answer 1

1molNa----------------6,023.10²³ atomi Na

x moli Na----------------3. 6,023 .10²³  atomi Na

x=3 . 6,023 .10²³ : 6,023 .10²³ =3moli Na

se afla cantit. de Na

n=m: M

m=n.M= 3 moli .23g/moli=69 g Na

1mol F2------------ 2. 6,023 .10²³ atomi fluor

y --------------------3 .6,023.10 ²³ atomi fluor

y=3. 6,023 .10²³ : 2 .6,023 .10²³=1,5 moli  fluor

m=1,5 moli .38g/moli=

1mol O2-----------2.6,023 .10²³ atomi

z-------------------3 .6,023 .10 ²³ atomi

z=3.6,023.10²³: 2 . 6,023.10 ²³=1,5 moli O2

m=1,5moli .32g=