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Ricardo891
@Ricardo891
December 2019
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Consulte as massas atômicas na tabela periódica e determine a massa molar de:
A) FE²O³
B) CaSO⁴
C) Al²(SO⁴)³
D) C9H8O⁴ (n consegui colocar o 9 e o 8 pequeno)
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TiagoEd
A) Fe2O3 - Fe = 56; O = 16
56*2 + 16*3 = 112+48 = 160 g/mol.
b) CaSO4 - Ca = 40; S = 32; O = 16
40 + 32 + 16*4 = 40 + 32 + 64 = 136 g/mol.
c) Al2(SO4)3 - Al = 27; S = 32; O = 16
27*2 + 32*3 + 16*12 = 54 + 96 + 192 = 342 g/mol.
d) C9H8O4 - C = 12; H = 1; O = 16
12*9 + 1*8 + 16*4 = 108 + 8 + 64 = 180 g/mol.
Espero ter ajudado. Bons estudos!
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56*2 + 16*3 = 112+48 = 160 g/mol.
b) CaSO4 - Ca = 40; S = 32; O = 16
40 + 32 + 16*4 = 40 + 32 + 64 = 136 g/mol.
c) Al2(SO4)3 - Al = 27; S = 32; O = 16
27*2 + 32*3 + 16*12 = 54 + 96 + 192 = 342 g/mol.
d) C9H8O4 - C = 12; H = 1; O = 16
12*9 + 1*8 + 16*4 = 108 + 8 + 64 = 180 g/mol.
Espero ter ajudado. Bons estudos!