The enthalpy of combustion for octane a key component of gasoline, is -5074 kJ/mol. The reaction equation is

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?