1.
6.022 * 10^23 at. Na ..................23 g
60.2 * 10^23 at. Na.......................x
x= 230g Na
2.
6.022 * 10^23 molecule de N2 ..................28g
18.03 * 10^23 molecule de N2 ...................y
y= 84g
3.
6.022 * 10^23 molecule H2SO4 ..................98g
1.204 * 10^23 molecule H2SO4.................... z
z= 19.6g
4.
6.022 * 10^23 atomi de Cu .......... 64 g
24,08 * 10^23 atomi de Cu ........ w
w= 256 g