<span>Because its a Chemical combination of 2 different pure Elements, it's a Compound. </span>
Answer:
= 2.94 atm
Explanation:
The total pressure () in the container is given by:
The pressure of the oxygen (
) and the pressure of the helium (
) can be calculated using the ideal gas law:
<u>Where</u>:
V: is the volume = 25.0 L
n: is the number of moles of the gases
R: is the gas constant = 0.082 Latm/(Kmol)
T: is the temperature = 298 K
First, we need to find the number of moles of the oxygen and the helium:
Where m is the mass of the gas and M is the molar mass
And the number of moles of helium is:
Now, we can find the pressure of the oxygen and the pressure of the helium:
Finally, the total pressure in the container is:
Therefore, the total pressure in the container is 2.94 atm.
I hope it helps you!
Answer:
The conversion of liquid water into gaseous water is a chemical change
Explanation:
A chemical change occurs when there is a chemical reaction, so there'll be changed in the compounds, such as forming new ones, forming its elements, or elements forming compounds.
A physical change occurs when there is a change in the state of aggregation of the compound, it means that it changes its physical state. Solid for liquid, liquid for solid, liquid for gas, gas for liquid, solid for gas, and gas for solid are the physical changes.
So the evaporation of water, or its conversion in gaseous water, is a physical change, not a chemical change.
Answer:
<em>B. A possible explanation for why something happens.</em>
Explanation:
By the process of elimination, it's none of the others but B.
Answer:
Motile bacteria have flagella, while nonmotile bacteria do not.
Explanation:
