Based on the methods used in the video, answer the following gram to gram conversion question:



2 C2H6 + 7 O2 --------> 4 CO2 + 6 H2O



In the combustion of ethane (C2H6), 4.12 grams of water (H2O) was produced. How much ethane (C2H6), in grams, was used in this reaction?



molar mass H2O= 18.02 g/mol

molar mass C2H6= 30.08 g/mol



2.47 g C2H6


2.29 g C2H6


20.63 g C2H6


20.97 g C2H6