As an employee of the los angeles air quality commission, you have been asked to develop a model for computing the distribution of no2 in the atmosphere. the molar flux of no2, at ground level, n"a,0 is presumed known. this flux is attributed to automobile and smoke stack emissions. it is also know that the concentration of no2, at a distance well above ground level is zero and that no2, reacts chemically in the atmosphere. in particular, no2, reacts with unburned hydrocarbons (in a process that is activated by sunlight) to produce pan (peroxyacetylnitrate), the final product of photochemical smog. the reaction is first order, and the local rate at which it occurs may be expressed as ra [mol/m3/s] = -k1*ca.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).