<span>an immune response to a pathogen</span>
Teenagers have to recognize if their friend needs serious help because it can lead to very bad situations, if they're not treated properly. Warning signs may be distancing themselves from others, not talking a lot, getting into situations, they wouldn't want to get in before, not being in the same mood as they would always be, and even the most obvious ones where they explain their mental condition. You have to know who to turn to, if you can't provide the help that your friend needs, you can advise them to go to a therapist, call a hotline, speak with their loved ones, but you have to know that you can't brush it off, or say that "it's a phase", " stop being dramatic ", " you're too young to have these types of problems" etc. such phrases can be discouraging towards anyone and can lead to even worse situations.
The reason why the presence of dusty disks were surprising is because; A) such systems could not have formed planets.
<h3>
What is a dusty disk?</h3>
A dusty disk is a circumstellar disk of dust and debris found in the orbit around a star and sometimes these disks contain prominent rings.
Now, these disks around young stars are made up of 99% gas and 1% dust and this small amount of dust is still sufficient to make the disks opaque and dark at visible wavelengths.
Now, the dust may be 1% but it is 1 million times more than that found in our solar planets and it orbits at a distance from the star that is similar to the orbits of Earth and Venus around our own Sun.
The missing options are;
A) such systems could not have formed planets.
B) their composition differs so much from their stars.
C) their instruments were not thought to be powerful enough to make such a measurement.
D) gas and dust should be rapidly ejected into space by the radiation from a hot star.
Read more about Dusty Disks at; brainly.com/question/25624188
Answer:
D. all of the above is the correct answer.
Explanation:
The rate of disappearance of O2(g) under the same conditions is 2.5 × 10⁻⁵ m s⁻¹.
<h3>What is the rate law of a chemical equation? </h3>
The rate law of a chemical reaction equation is usually dependent on the concentration of the reactant species in the equation.
The chemical reaction given is;
The rate law for this reaction can be expressed as:
![\mathbf{= -\dfrac{1}{2}\dfrac{d[NO]}{dt} = -\dfrac{1}{1}\dfrac{d[O_2]}{dt}= +\dfrac{1}{2}\dfrac{d[NO_2]}{dt}}](https://tex.z-dn.net/?f=%5Cmathbf%7B%3D%20-%5Cdfrac%7B1%7D%7B2%7D%5Cdfrac%7Bd%5BNO%5D%7D%7Bdt%7D%20%3D%20-%5Cdfrac%7B1%7D%7B1%7D%5Cdfrac%7Bd%5BO_2%5D%7D%7Bdt%7D%3D%20%2B%5Cdfrac%7B1%7D%7B2%7D%5Cdfrac%7Bd%5BNO_2%5D%7D%7Bdt%7D%7D)
Recall that:
- The rate of disappearance of NO(g) = 5.0× 10⁻⁵ m s⁻¹.
- Since both NO and O2 are the reacting species;
Then:
- The rate of disappearance of NO(g) is equal to the rate of disappearance of O2(g)
![\mathbf{= -\dfrac{1}{2}\dfrac{d[NO]}{dt} = -\dfrac{1}{1}\dfrac{d[O_2]}{dt}}](https://tex.z-dn.net/?f=%5Cmathbf%7B%3D%20-%5Cdfrac%7B1%7D%7B2%7D%5Cdfrac%7Bd%5BNO%5D%7D%7Bdt%7D%20%3D%20-%5Cdfrac%7B1%7D%7B1%7D%5Cdfrac%7Bd%5BO_2%5D%7D%7Bdt%7D%7D)
Thus;
The rate of disappearance of O2 = 2.5 × 10⁻⁵ m s⁻¹.
Therefore, we can conclude that two molecules of NO are consumed per one molecule of O2.
Learn more about the rate law here:
brainly.com/question/14945022
