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BurroEmMatematica235
@BurroEmMatematica235
June 2019
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Qual a fórmula centesinal do C8H10N4O2?
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PedroPorter
Para encontrar a fórmula centesimal devemos dividir a massa de determinado elemento pela massa total do composto.
Calculando a Massa molar da cafeína temos
C8H10N4O2 = 8.12 + 10.1 + 4.14 + 16.2
C8H10N4O2 = 96 + 10 + 56 + 32
C8H10N4O2 = 194g
C8 = 96g
96/194 ≈ 0,4948 = 49,48%
H10 = 10g
10/194 ≈ 0,0515 = 5,15%
N4 = 56g
56/194 ≈ 0,2886 = 28,86%
O2 = 32g
32/194 ≈ 0,1649 = 16,49%
C 49,48%, H 5,15%, N 28,86%, O 16,49%
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Calculando a Massa molar da cafeína temos
C8H10N4O2 = 8.12 + 10.1 + 4.14 + 16.2
C8H10N4O2 = 96 + 10 + 56 + 32
C8H10N4O2 = 194g
C8 = 96g
96/194 ≈ 0,4948 = 49,48%
H10 = 10g
10/194 ≈ 0,0515 = 5,15%
N4 = 56g
56/194 ≈ 0,2886 = 28,86%
O2 = 32g
32/194 ≈ 0,1649 = 16,49%
C 49,48%, H 5,15%, N 28,86%, O 16,49%