How can you improve the percent yield of copper in this lab? check all possible strategies that will you do so.

ans)measure reactants precisely.

ans)stir to the reaction take place.

chill the reactants before combining them.

ans)wait patiently until the reaction completes.

ans)make sure to recover as much copper as possible.

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

What reaction is taking place? 02 + c3h8 = h20 + co2

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