5-Methyl-5-ethyldecane should be the answer .
Yes this is true because they are able to consume 2 organisms which are plants and animal just like us.
Answer : The work done by the system is, 2.2722 J
Explanation :
The expression used for work done in reversible isothermal expansion will be,

where,
w = work done = ?
n = number of moles of gas = 0.00100 mole
R = gas constant = 8.314 J/mole K
T = temperature of gas = 
= initial volume of gas = 25 mL
= final volume of gas = 75 mL
Now put all the given values in the above formula, we get:


Therefore, the work done by the system is, 2.2722 J
The compound is Al2O3. The ratio of aluminum to oxygen is 2:3.