R - элемент
Х - вещество
Mr (K₃PO₄) = 3*39 + 31 + 4*16 = 212
w (K) = 3*39/212 = 0,552 = 55,2%
w (P) = 31/212 = 0,146 = 14,6%
w (O) = 4*16/212 = 0,302 = 30,2%
R - элемент
Х - вещество
Mr (K₃PO₄) = 3*39 + 31 + 4*16 = 212
w (K) = 3*39/212 = 0,552 = 55,2%
w (P) = 31/212 = 0,146 = 14,6%
w (O) = 4*16/212 = 0,302 = 30,2%