A student dissolved 28.20 g of CuNO3, in enough water to make 50.00 ml. of stock solution. He took 5.80 ml of the stock solution and then diluted it enough water to give 20.00 mL of a final solution. What is the molar concentration of the dilution? Record your answer with 3 decimals.

Based on the equation and the information in the table, what is the enthalpy of the reaction?

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

Nan element’s square on the periodic table, the number with the greatest numerical value represents the