1. Tentukan jumlah atom masing-masing unsur dalam rumus kimia berikut!
a. C6 H12 O6
b. 2 HC IO3
c. 4 CO(NH2)2
d. 3 AI2 (SO4)2
e. 5 Ca3 (PO4)2
a. C6 H12 O6
b. 2 HC IO3
c. 4 CO(NH2)2
d. 3 AI2 (SO4)2
e. 5 Ca3 (PO4)2
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b. atom H = 2x1, Cl = 2x1, O = 2x3, total = 10 atom
c. atom C = 4x1, O = 4x1, N = 4x2x1, H = 4x2x2, total = 32 atom
d. atom Al = 3x2, S = 3x2x1, O = 3x2x4, total = 36 atom
e. atom Ca = 5x3, P = 5x2x1, O = 5x2x4, total = 65 atom