chem exam 8 Flashcards
1
Q
- variation in pressure in Earth’s atmosphere creates wind, and changes in pressure that help us predict (multiple choice)
A
weather
2
Q
- there are four basic properties of a gas sample: pressure (P), volume (V); temperature (T), and amount in
(multiple choice)
A
moles
3
Q
- human beings can survive for weeks without food, days without water, but only ___ without air
A
minuetes
4
Q
- The average distance that a molecule in a jar travels between collisions is called?
A
Mean Free Path
5
Q
- Fortunately, we live at the bottom of a vast ocean of air, held together to Earth by ____
A
Gravity
6
Q
- The instrument used to measure atmosphere pressure is called ___
A
Barometer: instrument used to measure atmospheric pressure
7
Q
- The process by which gas molecules spread out in response to a concentration gradient is called ___
A
Diffusion
8
Q
- when the desired product of a chemical reaction is a gas, the gas is often collected by the ____ of water
A
displacement
9
Q
- the SI unit of pressure, defined as 1N/m^2 is called
A
Pascal (Pa)
10
Q
- According to Charles law, when air is heated, its volume increases, resulting in a lower ___
A
Density
11
Q
Matching 11.
Law that states for a constant number of particles at constant pressure, the volume of gas is proportional to its pressure
A
Charles Law
12
Q
Matching 12.
Law that states that the total pressure of a gas mixture is the sum of the partial pressure of its components
A
Dalton’s law
13
Q
Match 13.
Law states that at constant temperature and pressure, the volume of a gas is proportional to the number of particles
A
Avogadro’s Law
14
Q
Match 14.
Law states that for a constant number of Particles at constant temperature, the volume of gas is inversely proportional to its pressure
A
Boyle’s Law
15
Q
- Fill in the blank
We can use the ideal gas law in combination with mass measurements to calculate the molar mass of a ___
A
Unknown gas
