A sample of neon gas (Ne: monatomic, molar mass M = 20.2 g/mol) at a temperature of 2.51'C is put into a steel container of mass 42.7g that's at a temperature of -57.0 C . The final temperature is -15.9C . (No heat is exchanged with the surroundings, and you can neglect any change in the volume of the container.) What is the mass of the sample of neon (in grams)? Specific heat of steel 502.4J/kgK Ideal Gas constant R=8.31446J/(K-mol) nswered :t Answer 77.5696 margin of error +/- 1%