Calculate the heat of formation of benzene from the following data, assuming no resonance. Bond energies :

C – C = 83 kcal = 140 kcal C – H = 99 kcal

Heat of atomisation of C = 170 .9 kcal

Heat of atomisation of H = 52.1 kcal

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#Question id: 11297

#XL - R Botany

What is the difference between gross and net primary production?

TLS Online TPP Program

#Question id: 11298

#XL - R Botany

A pyramid of numbers shows _____________.

TLS Online TPP Program

#Question id: 11299

#XL - R Botany

Carbon is initially incorporated into the food chain by _____________

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#Question id: 11300

#XL - R Botany

What type of organisms convert nitrates and nitrites into nitrogen gas?

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#Question id: 11301

#XL - R Botany

How is phosphorus returned to the soil from organic phosphorus?

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#Question id: 11302

#XL - Q Biochemistry

Solute selectivity is elegantly illustrated by maltoporin. This bacterial outer membrane protein facilitates the diffusion of: