Did an oxidation-reduction reaction occur in the reaction between copper sulfate and sodium sulfide? cuso4 + na2s → cus + na2so4 a. this is a redox reaction because copper gained electrons. b. this is a redox reaction because sodium lost electrons. c. this is a redox reaction because sulfur gained electrons. d. this is not a redox reaction because no electrons were transferred. e. this is not a redox reaction because oxygen did not gain electrons.
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Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
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Did an oxidation-reduction reaction occur in the reaction between copper sulfate and sodium sulfide?...
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