Nokkur dæmi um útreikning á formúlumassa
| H2O |
Fjöldi atóma |
Atómmassi u |
= |
Heildarmassi |
| H |
2 |
1,00794 |
|
2,01588 |
| O |
1 |
15,9994 |
|
15,9994 |
|
|
|
|
————— |
| Formúlumassi |
|
|
|
18,01528 u |
| |
|
|
|
18,02 u |
| Al(OH)3 |
Fjöldi atóma |
Atómmassi u |
= |
Heildarmassi |
| Al |
1 |
26,9815 |
|
26,9815 |
| O |
3 |
15,9994 |
|
47.9982 |
| H |
3 |
1,00794 |
|
3,02382 |
|
|
|
|
————— |
| Formúlumassi |
|
|
|
78,01352 u |
| |
|
|
|
78,01 u |
| (NH4)2SO4 |
Fjöldi atóma |
Atómmassi u |
= |
Heildarmassi |
| N |
2 |
14,0067 |
|
28,0134 |
| H |
8 |
1,00794 |
|
8,06352 |
| S |
1 |
32,066 |
|
32,066 |
| O |
4 |
15,9994 |
|
63,9976 |
|
|
|
|
————— |
| Formúlumassi |
|
|
|
132,14052 u |
| |
|
|
|
132,14 u |
| Cu(NO3)2 · 6H2O |
Fjöldi atóma |
Atómmassi u |
= |
Heildarmassi |
| Cu |
1 |
63,55 |
|
63,55 |
| N |
2 |
14,0067 |
|
28,0134 |
| O |
6 |
15,9994 |
|
95,9964 |
|
|
|
|
————— |
|
|
|
|
187,5598 |
| Vatn |
Fjöldi vatnssameinda |
Sameindamassi u |
= |
|
| H2O |
6 |
18,01528 u |
|
108,09168 |
|
|
|
|
————— |
| Formúlumassi |
|
|
|
295,65148 u |
| |
|
|
|
295,65 u |