Reference no: EM131716457

Assignment

Question 1. Whether a substance exists as a gas, liquid, or solid depends on the balance between the kinetic energy of its particles and the strength of the interactions between the particles.
True
False

Question 2.Match the property with s, l or g.

Expands to fill the container

A fixed volume that takes the shape of the container it occupies

A definite shape and volume

Arrangement of particles: randomly arranged, disorganized and far apart.

Fixed arrangement of very close particles

Density is low (< 0.01 g/mL)

Particles are moving very fast

Interactions between the particles is very strong

Densities are around 1 g/ml

1. No interactions between the particles
A. solid
B. gas
C. liquid

Question 3.

Match up the gas name with the definition.

Boyle's Law:

Charles's law:

Gay-Lussac's (Amonton's) law:

The combined gas:

Avogadro's law:

Standard molar volume:

The ideal gas law:

1. Dalton's law:
A. For a fixed amount of gas at constant temperature, the pressure and volume of the gas are inversely related.
B. The total pressure (Ptotal) of a gas mixture is the sum of the partial pressures of its component gases.
C. When the pressure and temperature are held constant, the volume of a gas is proportional to the number of moles present.
D. All four properties of gases (i.e., P, V, n, and T) can be combined into a single equation which can operate outside of STP.
E. All three gas laws (Boyle's, Charles' and Gay-Lussac) can be combined into one equation.
F. At STP, 1 mole of any gas has a volume of 22.4 L.
G. For a fixed amount of gas at constant pressure, the volume of the gas is proportional to its Kelvin temperature.
H. For a fixed amount of gas at constant volume, the pressure of a gas is proportional to its temperature in Kelvin .

Question 4

1. Pressure is calculated from (Force / ____)

Question 5

The units of pressure are (pick one)

mm Hg
torr
pounds per square inch (psi)
Pascals (Pa)
atmospheres (atm)
All of the above

Question 6

The tires on a road bike are inflated to 90. psi. Convert this pressure to mm Hg.

1 atm = 14.7 psi = 760. mm Hg
4,700 mm Hg
1.7 mm Hg
68,400 mm Hg
4,653.1 mm Hg

Question 7

If a 4.0-L container of helium gas has a pressure of 10.0 atm, what pressure does the gas exert if the volume is increased to 6.0 L? Units of atmospheres are assumed here for your answer so just write the number value.

Question 8

Calculate the Kelvin temperature to which 10.0 L of a gas at 27 °C would have to be heated to change the volume to 12.0 L. Units of Kelvin are assumed here for the answer you enter so just put the number value.

Question 9

1. When performing gas laws calculations what units of temperature should you always use?

Celsius
Kelvin
Fahrenheit

Question 10
If a plastic container of food at 1.0°C and 750. mm Hg is heated in a microwave to 80. °C, what is the new pressure inside the container? mmHg are the units of the answer and you can just enter the number value for the pressure.

Question 11

At STP, 1 mole N2 gas occupies Blank 1 L, and this accounts for ____ 2 x 1023 molecules and 28.0 _____ 3 of nitrogen.

Question 12
How many moles are contained in 2.0 L of N2 at standard temperature and pressure. You need just enter the number value and the units are moles of nitrogen gas.

Question 13
How many moles are contained in 5.33 L of at standard temperature and pressure?

A. 5.33 mol of O2
B. 1.00 mol of O2
C. 0.238 mol of O2
D. 22.4 mol of O2
E. 4.20 mol of O2

Question 14
How many moles of gas are contained in a typical human breath that takes in 0.50 L of air at 1.0 atm pressure and 37 oC? Units are moles - just write the number.

Question 15
A sample of exhaled air contains four gases with the following partial pressures: N2 (563 mm Hg), O2 (118 mm Hg), CO2 (30 mm Hg), and H2O (50 mm Hg). What is the total pressure of the sample?
Units are mmHg, just write the number.

Question 16
An air filled balloon has a volume of 215 mL at 23oC. If the T drops to -65oC, will the balloon now expand, stay the same or shrink? (P and n constant)

Expand
Stay the same
Shrink

Question 17
What observation do you make as this reaction goes forward? Select all that apply.

2 Na(s) + 2 H2O(l) -> H2(g) + 2 NaOH(aq)

There will be a color change
All solid will disappear and dissolve into solution.
There will be bubbling from the liquid.
All liquid will disappear.

Question 18
Which cylinder at STP will contain the greatest number of gas particles?

a 5.0-L cylinder of neon
a 5.0-L cylinder of helium
a 5.0-L cylinder of nitrogen
a 5.0-L cylinder of hydrogen
All of the cylinders above contain the same number of gas particles.

Question 19
For a deep dive, a scuba diver uses a mixture of helium and oxygen with a total pressure of 7.28 atm. If the oxygen has a partial pressure of 1,600 mm Hg, what is the partial pressure of the helium in mm Hg?

Question 20
Consider the balanced reaction: Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g). What volume of H2(g) at STP can be generated when 134 g of zinc reacts?

5.98 L
3.00 × 103 L
45.9 L
2.05 L

Question 21

Dry air is 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide so varying amounts of water vapor- depending on humidity. Some gaseshowever strongly absorb infrared radiation and trap it in the atmosphere and can therefore result in elevated global temperatures. Therefore they are termed greenhouse gases.

Which greenhouse gas have we observed a marked increase in atmospheric concentrations in the last 100 years?

ozone (O3)
carbon dioxide
carbon monoxide
oxygen
methane (CH4)
water vapor (H2O)
nitrogen

Question 22
Elevated global temperatures result in the air above land being Term 1and having Term 2, while the air above the ocean becomes Term 3 and with Term 4

Question 23
Warming over land and warming over the seas and their own specific impacts:

heatwaves result from:
hurricanes with increased rainfall result from:
Ocean acidifcation and warming result from :
Sea level rise and ice cap melting result from:

Wildfires result from:

The spread of mosquito-borne and tropical diseases from tropical and subtropical climate zones into regions previously too temperate or cold for their survival result from :

•Droughts result from
A. warming over the land.
B. warming over the seas.