An ideal gaseous reaction (which is a hypothetical gaseous reaction that conforms to the laws governing gas behavior) occurs at a constant pressure of 35.0 atmatm and releases 71.8 kJkJ of heat. Before the reaction, the volume of the system was 8.80 LL . After the reaction, the volume of the system was 2.80 LL . Calculate the total internal energy change, ΔEΔEDelta E, in kilojoules.

The answer for #3 is c but i don't know why

Which of the following statements is true about planck’s law

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