The standard heat of combustion of ethane is -1540KJ mol^-1. assuming that the process is 80% efficient, what is the volume of ethane gas measured at room condition required to raise the temperature of 40.5kg of water from 25°C to 85°C (Given c water= 4.18 and 1 mole of gas occupies 24dm³ at room condition​

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

the correct answer would be d. hope this !

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