Thee volume of helium measured at 772 torr and 24.7°C needed to fill the cylinder
Answers
Answer:
The following information is often presented on the first page of exams covering this chapter under the heading: “potentially useful information.”
(P + n2a/V2)(V - nb) = nRT R = 0.0826 L-atm/mol-K
N = 6.022 x 1023 particles per mole STP = 0°C and 1 atm
1 atm = 760 mmHg = 760 torr = 101.325 kPa
Ideal Gases
6-1. Which of the following elements or compounds is most likely to be a gas at room temperature?
(a) a metal such as sodium (Na).
(b) an alloy of two metals such as bronze, which is a mixture of copper (Cu) and tin (Sn).
(c) a salt such as MgO.
(d) a nonmetal such as chlorine (Cl2).
(e) none of these elements or compounds will be a gas at room temperature.
Answer: (d)