Answer:
The new pressure of the gas is 1080 mmHg
Explanation:
The general equation provides a way to calculate the relationship between changesnp in volume, temperature and pressure of a given mass of gas.
The general gas equation is given as P1V1/T1 = P2V2/T2
Where P1 is initial pressure of gas
V1 is initial volume of gas
T1 is initial temperature of gas
P2 is final pressure of gas
V2 is final volume of gas
T2 is final temperature of gas
From the given question, P1 = 900 mmHg, V1 = 0.8 L, T1 = 400 K, P2 = ?, V2 = 0.5 L, T2 = 300 K
Making P2 subject of the general gas equations:
P2 = P1V1T2/V2T1
P2 = (900 × 0.8 × 300) / (0.5 × 400)
P2 = 1080 mmHg
Therefore, the new pressure of the gas is 1080 mmHg.
Answer:
<em>The number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in. ... the number of electrons in all shells of an element is represented in the periodic table as the element's atomic number.</em>
Explanation:
<em>thatdummyemily </em>
<em>hope this helps srry if it doesn't tho, but if it does help can u plz mark me brainlist</em>
Answer:
This question is incomplete, the remaining part of the question is:
What is the control group, independent variable and dependent variable?
Control group: Plants placed in 80 degree rooms
Independent variable: Change in temperature
Dependent variable: Change in color of leaves
Explanation:
The independent variable in a scientific experiment is the variable that the experimenter controls or manipulates in order to bring about a change in the dependent variable. In this experiment, the variable manipulated by Justin B is the TEMPERATURE CHANGE.
On the other hand, a variable is said to be dependent if it is the variable that responds to a change made to the independent variable or rather it is the outcome. In this experiment, Justin B is trying to see the outcome on the color change in leaves when exposed to a low temperature, hence, COLOR CHANGE IN LEAVES is the dependent variable.
Control group of an experiment is the group that receives no experimental treatment. It is the group the experimenter considers normal and hence is comparing with his experimental group. In this experiment, Justin B believes the leaves change color in a low temperature, hence, he placed some plants in a lower temperature (60 degree) in order to compare them with when the plants are placed in a higher temperature (80 degree). As far as this experiment is concerned, the plants placed in 80 degrees temperature are believed by Justin B not to undergo color change, hence, they are the CONTROL GROUP while the group he placed in 60 degrees temperature are what he is interested in, making them the EXPERIMENTAL GROUP
Answer:
Explanation:
Rivers may be contaminated by sewage.
I do hope I helped you! :)
