C) chloric acld A) The average kinetic energy of molecules from samples of ideal

Question

C) chloric acld A) The average kinetic energy of molecules from samples of ideal gases are the same at the same temperature. 8) The molecules of an ideal gas are relatively far apart C) All the molecules of a gas are traveling at exactly the same speed. D) Molecules of a gas undergo many collision with each other and the container walls E) Molecules of greater mass have a lower average speed than those of less mass Which statement is false about gases at the same temperature? 3. A gas sample contains 0.1 moles of oxygen and 0.4 moles of nitrogen. If the sample is at standard temperature and pressure, what is the partial pressure due to nitrogen? A) 0.1 atm 8) 0.2 atm C) 0.5 atm D) 0.8 atnm E) 10.0 atm A gas collected over water at 21.5°C has a pressure of 779 torr. The vapor 4. pressure of water at 21 5°C is 19 2 mmHg. What is the pressure of the "dry" gas(pressure of gas without water vapor)? A) 759.8 torr 8) 760 torr C) 760. torr D) 1.025 atm E) STP 5. highest average velocities? At the same temperature and pressure, which gas molecules will have the A) H2 B) O2 C) CH4 D) SF E) All are the same.

Explanation / Answer

Q2

a)

this is true, since nergy is directly related to temperature

b)

this is true, for any gas

c)

false, this is not the case, they are distributed randomly

d)

true, they collide plenty of times

e)

true, higher mass, implies lower V

choose C

Q3

for nitrogen -> X-N2 = mol ot N2 / Total = 0.4/0.5 = 0.8

if STP = 1 atm, then

0.8*1 = 0.8 atm

Q4

Pdry = Ptotal - Pvapor = 779 - 19.2 = 759.8 torr

Q5

higher velocities --> least in mass

H2 has MW = 2 g/mol

therefore, the lightest of all, i.e. fastest

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.