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Lorenzo27
@Lorenzo27
December 2019
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4- Determine o número de átomos existentes em:
a) 8g de cálcio ( Ca = 40 )
b) 0,5g de hélio ( He = 4 )
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collegeurban
40g/mol de ca----------------6,02^23 atomos de ca = constante de avogadro
8g de ca------------------------------------x
x=1,20^23.
4g/he----------------------6,02^23
0,5g/he----------------------x
x=7,50^22/atomos de he.
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8g de ca------------------------------------x
x=1,20^23.
4g/he----------------------6,02^23
0,5g/he----------------------x
x=7,50^22/atomos de he.