1.Qual das alternativas abaixo apresenta somente substâncias compostas:
a)N2, P4, S8.
b)CO,...
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Biology, 30.04.2021 01:00 goldwinner300
1.Qual das alternativas abaixo apresenta somente substâncias compostas:
a)N2, P4, S8.
b)CO, He, NH3.
c)CO2, H2O, C6H12O6.
d)N2, O3, H2O.
e)H2O, I2, Cl2.
2.Com relação ao número de fases, os sistemas podem ser classificados como homogêneos ou heterogêneos. As alternativas correlacionam adequadamente o sistema e sua classificação, exceto em:
a)Água de coco/heterogêneo
b)Laranjada/ heterogêneo
c)Leite/homogêneo
d)Poeira no ar/ heterogêneo
e)Água do mar filtrada/homogêneo
3.Com relação às substâncias O2, H2, H2O, Pb, CO2, O3, CaO, S8, podemos afirmar que:
a)Todas as substâncias são simples.
b)Somente O2, H2 e O3 são substâncias simples.
c)Todas são substâncias compostas.
d)Somente CO2, CaO, S8 são substâncias compostas.
e)As substâncias O2, H2, Pb, O3 e S8 são simples.
Me ajudem, por favor!!
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