Question

Problem 10.36 a neon sign is made of glass tubing whose inside diameter is 2.5 cm and whose length is 5.5 m. part a if the sign contains neon at a pressure of 1.77 torr at 36 ∘c, how many grams of neon are in the sign? (the volume of a cylinder is πr2h.)

Answer 1

Answer: Volume = pi x r² x L = 3.14 x (1.25 cm)² x 550 cm x (1 mL / 1 cm³) x (1 L / 1000 mL) = 2.70 L PV = nRT n = mass / mw PV = (mass / mw) RT mass = mw x PV / RT mass = (20.2 g/mole) x (1.78 torr x (1 atm / 760 torr)) x (2.70 L) / [(0.0821 Latm/moleK) x (308K)] mass = 0.00505 grams Ne ******** Trevor H.... check this... n = 2.7*0.237 / 8.314*308