Answer : Option B) <span>The oxygen in the air forms ozone in presence of UV rays
Explanation : The other given options for the chemical change seems to be irrelevant as the option A which converts water into different forms can be called as physical change, option C only dust and soot particle are released in air where no new substance is formed And in option D sulfur dioxide is getting released into air which is also a form of a physical process.
So in option B we can see a new compound getting formed which is ozone in presence of UV rays hence it is a chemical change.</span>
Explanation:
Liquids cannot change volume but gases can because they have a fixed shape like solids.
Liquids have strong intermolecular forces binding their molecules together resulting is fixed ordering.
- Gases are randomized with their molecules haphazardly arranged.
- This allows them to expand spontaneously on their own.
- Molecules of liquids are more tightly packed compared to gases.
- In a liquid, the molecules have a less random pattern of motion and can only slide past one another.
- In a gas, the molecules are in continuous random, straight line motion.
Learn more:
Gases brainly.com/question/7966903
#learnwithBrainly
Answer:
Explanation:
Let's assume that Helium is He and Neon is Ne
Then, the expression of the steady-state flux of Helium in a binary mixture of Helium and Neon is:
where;
= concentration of Helium
= net velocity of Helium
Making the subject, we have:
The expression for the steady-state flux of Neon
Here;
= Concentration of neon
= net velocity of neon species
Thus, the net velocity of species Ne along the direction of mass transfer = 0 m/s
The average velocity V is:
The average mass velocity is:
Answer:
In thes structure of PO43- there are a total of 32 valence electrons. For the structure for PO4 3- you should take formal charges into account to find the best structure for the molecule. Remember, PO4 3- has a negative three charge on the molecule.
Explanation: