How many grams of oxygen are needed to completely burn 124
grams of C, H,? The molar mass of
C, H, is 26.038 g/mol. The molar
mass of O, is 31.998 g/mol. Round
your answer to a whole number.

Mass of oxygen = molar mass × moles.

= 32×62.5.

= 2,000 g of oxygen are needed to burn the 570 g (5 moles) of octane completely.Explanation:

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.