Cyclobutane decomposes to ethylene according to the equation: C4H8(g) → 2C2H4(g). Determine the value of the rate constant for the reaction based on the following pressures, which were recorded when the reaction was carried out at 430°C in a constant-volume vessel.

Time, s Pc4h8 (mm Hg) ln P
0 400
2000 316
4000 248
6000 196
8000 155
10000 122

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

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Amixture with the same composition throughout is!