A student was asked to prepare 2.5 L of a 3.5M CuSO4 solution (the molar mass of CuSO4 = 159.6060 g/mol). The student placed 400.0g of CuSO4 crystals in a 2.5 L (2500 mL) volumetric flask and filled it with water to the 2500-mL mark. the resulting solution was not 3.5M, it was only 1.0M. This means that the solution was too dilute. Did the student add too much CuSO4 or too little CuSO4?

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