1: Explain how you can use Boyle’s Law to determine the new volume of
gas when its pressure is increased from 270 kPa to 540 kPa? The original
volume of gas was 1 L. Assume the temperature and number of particles are constant. What is the new volume?
Boyle's Law of gases: At constant temperature, the volume of a gas is inversely proportional to the pressure of the gas.
This is pV = constant. Then 1 L * 270 kPa = x * 540 kPa => x = 1L*270 kPa /540 kPa = 0.5 L
2: What are three common clues that a chemical change has occurred?
- Change of color
- Production of bubles
- Change of temperature
- Production of odors / smell
- Formation of precipitates (solids)
3: You have a sealed glass jar full of air. If you put it in the freezer, what happens to the gas pressure in the jar?
The pressure decreases, according to Gay-Lussac, at constant volume, the pressure and the temperaure of a gas are proportional.
Then at lower temperature (inside the freezer) the pressure in the jar will decrase.
4: Name and describe the phase change that occurs when solid carbon
dioxide (dry ice) is placed in an open container at room temperature.
This change of phase is called Sublimation. The solid passes directly to gas state, without passing by the liquid state.
Take your 23.4 cm^2 .
Multiply it by
(1 meter / 100 cm) ^2 .
If you handle all of the units correctly,
you'll end up with 0.00234 m^2 .
Current in an electrical circuit can effectively be reduced to zero by inserting a very high resistance
C is the correct answer.
all substances found on the periodic table are elements by definition. anything that is created using elements, such as methane, carbon dioxide, or water, are all compounds.
The right answer is Q).
Explanation:
P) Depicts organ level of organization.
R) Depicts cellular level of organization.
S) Depicts Organ System level of organization.