1.of the following pure susbances,which has the highest melt

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1.of the following pure susbances,which has the highest melting point?
AS8 B.I2 C.SiO2 D.SO2 E.C6H6
2.In the electroplating of nickle,0.2 faraday of electrical charge is passes through a solution of NiSO4.What mass of nickle is deposited?
A.2.94g B.5.87g C.11.7g D.58.7g E.294g

1.C 以下选项哪个熔点最高?
熔点：S 119.0 I 113.5 SiO21670/1710(鳞石英/方石英) SO2

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