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122456777899u4e
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December 2021
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madstudy
1.w(H)=1*3/98*100%=3.06%
w(P)=31/98*100%=31.6%
w(O)=16*4/98*100%=65.3%
2 450мг=0.45 г
w(примесей)=0.45/500*100%=0.09%
3 w(P)=m(P)/m(смеси)*100%
m(смеси)=138+12=150г
w(P)=12/150*100%=8%
4 m(Al)=150*(100-2.4)/100=146,4 г
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Answers & Comments
w(P)=31/98*100%=31.6%
w(O)=16*4/98*100%=65.3%
2 450мг=0.45 г
w(примесей)=0.45/500*100%=0.09%
3 w(P)=m(P)/m(смеси)*100%
m(смеси)=138+12=150г
w(P)=12/150*100%=8%
4 m(Al)=150*(100-2.4)/100=146,4 г