(b) The student collects the H2(g) produced by the reaction and measures its volume over water at 298 K after carefully equalizing the water levels inside and outside the gas-collection tube, as shown
in the diagram below. The volume is measured to be 45.6 mL. The atmospheric pressure in the lab
is measured as 765 torr, and the equilibrium vapor pressure of water at 298 K is 24 torr. (ii) The number of moles of H_2 (g) produced in the reaction .

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

An observation that requires measurement is called quantitative observable or qualitative

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.