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2010-03-10T16:08:16+01:00
Al₂(SO₄)₃=27*2+3*(32+16*4)=54+96+3*64=150+192=342unity.

(NH₄)₃PO₄=14*3+4*3+31+16*4=42+12+31+64=149 unitów.
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2010-03-10T16:10:03+01:00
Al₂(SO₄)₃=2×27u+3×32u+12×16u=54u+96u+192u=342u

(NH₄)₃PO₄=3×14u+12×1u+1×31u+4×16u=42u+12u+31u+64u=149u