Oblicz zawartość procentową (procent masowy) pierwiastków chemicznych w wodorotlenku wapnia.
mCa(OH)2=40u+2*16u+2*1u=40+32u+2u=74u
74u-100%
40u-x%
---------------
4000=74x
x=4000:74=54,05% wapnia Ca
32u-x%
------------
3200=74x
x=3200:74=43,24% tlenu
2u-x%
--------------
200=74x
x=200:74=2,71%wodoru
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mCa(OH)2=40u+2*16u+2*1u=40+32u+2u=74u
74u-100%
40u-x%
---------------
4000=74x
x=4000:74=54,05% wapnia Ca
74u-100%
32u-x%
------------
3200=74x
x=3200:74=43,24% tlenu
74u-100%
2u-x%
--------------
200=74x
x=200:74=2,71%wodoru