Which of these is NOT a possible type of energy transformation?
A. electrical energy into light energy
B. sound energy into nuclear energy
C. potential energy into kinetic energy
D. kinetic energy into mechanical energy

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

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

If a solution had a ph of 7 what is the solution