Question 2 (5 points) A hiker in Northern Sweden inhales 325 mL of air at -15 o

Question

Question 2 (5 points)

A hiker in Northern Sweden inhales 325 mL of air at -15oC. What is the volume, in mL, occupied by amount of air in the lungs if his body temperature is 37oC? The final volume in the lungs is _____ mL.

Question 2 options:

390

362

1367

149

Question 3 (5 points)

How many atmospheres are in 710 mm Hg?

Question 3 options:

1.07 atm

0.934 atm

5.40 x 105 atm

Question 4 (5 points)

According to the kinetic-molecular theory, the total kinetic energy of gas particles is constant (no energy loss through friction).

Question 4 options:

Question 5 (5 points)

When heated to 350oC at 0.950 atm, ammonium nitrate decomposes into the following gases : nitrogen, oxygen and water. How many grams of ammonium nitrate are needed to produce 5.00 L of oxygen?

The balanced chemical equation is:

2 NH4NO3(s) -> 4 H2O(g) + O2(g) + 2 N2(g)

The mass of NH4NO3 needed is ___g.

Question 5 options:

12.3 g

14.9 g

16.2 g

18.6 g

Question 6 (5 points)

Oxygen gas (PO2 = .910 atm), helium gas (PHe = 1.24 atm), and carbon dioxide gas occupy the same container with a total pressure of 2.84 atm. What is the PCO2?

Question 6 options:

0.690 atm

2.15 atm

4.99 atm

Question 7 (5 points)

At a given temperature and pressure, the gas with the lower molar mass effuses faster because the most probable speed of its molecules is higher, so more molecules can escape per unit time.

Question 7 options:

Question 8 (5 points)

A sample of air has a volume of 5.40 L and a temperature of 25oC, what is the new volume if the temperature increases to 63oC while the pressure is held constant? The final volume is ___ L.

Question 8 options:

33.6

5.23

6.09

3.04

Question 9 (5 points)

On a hot summer day, you notice that a bag of chips left in your vehicle has inflated. Why did this happen?

Question 9 options:

as temperature increases, gas molecules gain kinetic energy and the volume of gas decreases inside the bag of chips

as temperature increases, gas molecules lose kinetic energy and the volume of gas increases inside the bag of chips

as temperature increases, gas molecules gain kinetic energy and the volume of gas increases inside the bag of chips

390

362

1367

149

Explanation / Answer

Answers:

Question 2: Option (a) 390 mL

Question 3: Option (b) 0.934 atm

Question 4: Option (b) false

Question 5: Option (b) 14.85g aprox. 14.9g

Question 6: Option (a) 0.690 atm

Question 7: Option (a) True (Graham law)

Question 8: Option (c) 6.088 L (aprox. 6.09 L)

Question 9: Option (c)

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