all 3 pleaseee help !

A major component of gasoline is octane (C8H18). When octane is burned in air, it chemically reacts with oxygen gas (O2) to produce carbon dioxide (CO2) and water (H2O). What mass of oxygen gas is consumed by the reaction of 3.7g of octane? Be sure your answer has the correct number of significant digits. Calculate the volume in mililiters of a 1.6mol/L silver perchlorate solution that contains 75.0g of silver perchlorate (AgClO4). Be sure your answer has the correct number of significant digits. A certain chemical reaction releases 366.kJ of heat energy per mole of reactant consumed. Suppose some moles of the reactant are put into a calorimeter (a device for measuring heat flow). It takes 4.78J of heat energy to raise the temperature of this calorimeter by 1C. Now the reaction is run until all the reactant is gone, and the temperature of the calorimeter is found to rise by 5.1C. How would you calculate the number of moles of reactant that were consumed? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols