Chemistry test chap 14 and 15
The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming constant temperature?
0.30 atm
=760 torr
1 atm
1 atm =
101.3 kappa
A tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?
1140 mmhg
A gas sample with a volume of 4.0 L has a pressure of 750 mmHg and a temperature of 77°C ° C . What is the new volume at 277°C ° C and 0.33 atm?
19 L
A gas occupies a volume of 500. Milliliter at a pressure of 380. Torr and a temperature of 298 K. At what temperature will the gas occuppy a volume of 250. Milliliter and have a pressure of 760. Torr?
298 k
A sample of nitrogen gas at 110 K has a pressure of 1.0 atm. When the temperature is increased to 360 K at constant moles and volume, the new pressure will be
3.3 atm
A sample of gas has a volume of 40.0 L at a pressure of 722. torr. What is the volume, in liters, of the gas at 753 torr, if there is no change in temperature and the amount of gas?
38.4L
Alpha particles have an atomic mass equal to ____.
4
A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740. torr, and a temperature of 25 °C. What was the new volume of the gas when the temperature was changed to 50. °C and the new pressure was 760. torr?
528 mL
A balloon has a volume of 646 mL at 19°C ° C . If the temperature drops to 8°C ° C , what is the new volume if the pressure remains at 1.00 atm the entire time.
622mL
63 tor =
63 mmhg
11.9 kPa =
89.3 mmhg
700. Mmhg equals
93.3 kPa
An atom has 98 protons and a mass of 249. If it undergoes alpha decay, what are the number of protons and mass #, respectively, in the resulting nucleus? ______
96,245
The total pressure in a mixture of gases is equal to the partial pressure of
All the gases added together
A (n)___ particle is the largest particle.
Alpha
When a(n)_____________________ is emitted from the nucleus, the mass number decreases by 4 amu.
Alpha particle
In beta decay,
An electron is emitted
For-220 undergoes alpha decay. What element will be formed
At
Carbon-14 decays naturally through a loss of a __________ particle into a stable isotope of a nitrogen
Beta
Positron is when
Both of the numbers don't change
In alpha decay, the atomic number is ___ and the mass # is _______.
Decreased by 2, decreased by 4
When an alpha particle is emitted from an unstable nucleus, the atomic mass number of the nucleus _______ .
Decreases by 4
A positron is a particle emitted from the nucleus that has the same mass as a(n)
Electron
1 atm = 1 torr
False
A dosimeter is a machine that conducts electricity when is comes into contact with radiation
False
Alpha decay is more dangerous than beta decay
False
Alpha decay is never accompanied by gamma ray emission
False
Beta particles can be stopped by skin
False
Ernest Rutherford discovered alpha and beta decay
False
In a positron decay a neutron is converted to a proton
False
The amount of gas has no affect on the pressure of the gas
False
There are five different types of radioactivity emissions
False
gasses compress much more easily than solids and liquids because their particles are closer together
False
If Au -198 undergoes beta decay, which of the following would be formed
Hg-198
What happens when a gas is heated?
It expands
Which of the following shows a radioisotope?
K-29
What unit of temperature is used in gas law calculations?
Kelvin
Which measurement describes the pressure of a gas
Mmhg
A can of shaving cream has an internal pressure of 1.2 atm at 25 degrees Celsius. The can of shaving cream was heated to a temperature of 200. degrees Celsius. A can of shaving cream can withstand an internal pressure of 2.2 atm. Will the can explode?
No, it will not explode
In beta decay, a neutron is converted to a
Proton
The process where an unstable nucleus releases small particles so it can become more stable is called
Radioactivity
Gamma rays cannot penetrate
Several meters of thick concrete
= 273K or 0oC
Standard temperature
To get neutrons you
Subtract the two numbers
Alpha decay is when
The top number decreases by 4 and the bottom decreases by 2
1 torr = 1 mmHg
True
A positron is a type of antimatter
True
Positrons dissolve when they come into contact with an electron and produce gamma rays
True
The curie and becquerel are units of radiation
True
You can never use Celsius in a gas law calculation, even if you are looking for an answer in Celsius
True
Beat decay
When the top numbers stay the same and the bottom numbers add 1
instrument for measuring atmospheric pressure
barometer
