(about the use of coal) can you think of any problems that could come from using only 15 years of data to predict trends for the next 100 years? explain your answer. how could you prevent some of these problems?

Different isotopes indicate that an element will have different numbers of

How many moles of gas are present if p=11 atm, v=12l, t=185k?

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