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July 2022
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Массовая доля фосфора в фосфате кальция равна:
1) 20,5%
2) 20,0%
3) 30,8%
4) 30,5%
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kanopuss
Ответ 2.
w(P)=31*2/310=0.2=20%
M(Ca3(PO4)2)=40*3+31*2+16*8=310
5 votes
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Shtyrjwjvgj
Ca3(po4)2
W%(P)=62:310 •100%=0,2•100%=20%
Ответ:2
2 votes
Thanks 5
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Answers & Comments
w(P)=31*2/310=0.2=20%
M(Ca3(PO4)2)=40*3+31*2+16*8=310
W%(P)=62:310 •100%=0,2•100%=20%
Ответ:2