Inspite of the breathing out carbon dioxide in a large amount and released by combustion the atmosphere has a mere fraction of percent of `CO_2` why?

Bulk of carbon dioxide (CO_2) released from body tissues into the blood is present as

Combustion reaction of carbon i) requires O_2 ii) releases heat iii) releases CO_2

What would be the electron dot structure of carbon dioxide which has the formula CO_2 ?

Enthalpy of combustion of carbon to CO_(2) is -393.5 kJ mol^(-1). Calculate the heat released upon formation of 35.2 g of CO_(2) from carbon and dioxygen gas.

Answer carefully: (a) Two large conducting spheres carrying charges Q_(1) and Q_(2) are brought close to each other. Is the magnitude of electrostatic force between them exactly given by Q_(1),Q_(2)//4pi epsilon_(0)r^(2) , where r is the distance between their centres? (b) If Coulomb’s law involved 1//r^(3) dependence (instead of would Gauss’s law be still true ? (c) A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point? (d) What is the work done by the field of a nucleus in a complete circular orbit of the electron? What if the orbit is elliptical? (e) We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there? (f) What meaning would you give to the capacitance of a single conductor? (g) Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).