обчисліть масову частку кожного елемента в кальцій карбонаті CaCO3? Срочно
CaCO3
w = Ar(X) * a * 100%
Mr вещ-ва
Mr(CaCO3) = 40 + 12 + 16*3 = 100
w(Ca) = 40 * 1 * 100% = 40%
100
w(C) = 12 * 1 * 100% = 12%
w(О) = 16 * 3 * 100% = 48 %
M(CaCO3)=100 w(Ca)=40:100=0,4(40%)
w(C)=12:100=0,12(12%)
w(O)=100%-(40%+12%)=48%
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Answers & Comments
CaCO3
w = Ar(X) * a * 100%
Mr вещ-ва
Mr(CaCO3) = 40 + 12 + 16*3 = 100
w(Ca) = 40 * 1 * 100% = 40%
100
w(C) = 12 * 1 * 100% = 12%
100
w(О) = 16 * 3 * 100% = 48 %
100
Verified answer
M(CaCO3)=100 w(Ca)=40:100=0,4(40%)
w(C)=12:100=0,12(12%)
w(O)=100%-(40%+12%)=48%