a A compressed gas cylinder weighs 47 lbf empty. When filled with a 75% argon, 25% carbon dioxide gas blend, the cylinder weighs 57 lbf. e) f) 8) /6 Find the molecular weight of the blended gas. /4 How many lb-moles of argon are in the filled cylinder? /8 When full of argon, the cylinder's internal pressure is 2000 psi (Ibf/in?) gage at 70F. Use the ideal gas law to find the cylinder's internal volume