Объяснение:
1. M (BaO2) = 137 + (16×2) = 169
w (Ba) = 137/169 = 0.81 × 100 = (примерно) = 81%
w (O2) = 32/169 = 0.19×100 = (примерно) = 19%
М (Mg2C3) = 24×2 + 12×3 = 84
w (Mg2) = 48/84 = 0.57 × 100 = 57%
w (C3) = 36/84 = 0.43 × 100 = 43%
M (Al2(SO4)3) = 27 × 2 + 32×3 + (16×4)×3 = 54 + 96 + 192 = 342
w(Al2) = 54/342 = 0.16 × 100 = 16%
w(S3) = 96/342 = 0.28 × 100 = 28%
w ((O4)3) 192/342 = 0.56 × 100 = 56%
2. Ca3(PO4)2
M(Ca3(PO4)2) = 40×3 + 31×2 + 16×4×2 = 120 + 62 + 128 = 310
w (P2) = 62/310 = 0.2 × 100 = 20%
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Answers & Comments
Объяснение:
1. M (BaO2) = 137 + (16×2) = 169
w (Ba) = 137/169 = 0.81 × 100 = (примерно) = 81%
w (O2) = 32/169 = 0.19×100 = (примерно) = 19%
М (Mg2C3) = 24×2 + 12×3 = 84
w (Mg2) = 48/84 = 0.57 × 100 = 57%
w (C3) = 36/84 = 0.43 × 100 = 43%
M (Al2(SO4)3) = 27 × 2 + 32×3 + (16×4)×3 = 54 + 96 + 192 = 342
w(Al2) = 54/342 = 0.16 × 100 = 16%
w(S3) = 96/342 = 0.28 × 100 = 28%
w ((O4)3) 192/342 = 0.56 × 100 = 56%
2. Ca3(PO4)2
M(Ca3(PO4)2) = 40×3 + 31×2 + 16×4×2 = 120 + 62 + 128 = 310
w (P2) = 62/310 = 0.2 × 100 = 20%