The leaves of trees, oxygen is mostly generated in the chloroplasts in the palisade layer. The oxygen molecule then have to find their way out of the leaf through small openings in the leaf known as stomatal pores. The diffusion constant for oxygen in the air is about D = 20 μm^2/s. The length of a stomata is about 40 μm and its area is about 6 μm^2. If the density of oxygen molecules in the air outside of the leaf is 1.0 x 10^7 molecules/μm^3, and the density inside the spongy layer is 3.0 x 10^7 molecules/μm^3, calculate the number of oxygen molecules that will leave the leaf through a single stomata per second.

precipitation

explanation:

when it goes from cloud to rain/back to earth in the form of rain

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.