GREETINGS!
IT SHOULD BE OPTION C
Because when you use mobile the chemical energy stored in the battery is used to make your mobile work, and Mobile phones communicate by Electromagnetic radio waves, and if u look at the option C it says PLAYS AVIDEO ON YOOOUTUBE that means sound energy so c is your answer
HOPE THIS HELPS YOU!
B. enough kinetic energy only
C. sufficient potential energy only
D. favorable geometry only
Answer: A. enough kinetic energy and favorable geometry
Explanation: According to collision theory, the rate of a reaction depends upon the number of effective collisions which means the collisions which result in the formation of product which in turn depend on following two factors:-
a) Energy factor: In order for a collision to be successful, the colliding molecules must cross a energy barrier which is called as threshold energy. Thus molecules with energy less than threshold energy are not able to result into products.
b) Orientation factor: the colliding molecules must have proper orientations at the time of collision otherwise they do not result in product formation.
It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom.
It is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion.
It is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.
B is not the correct answer. The -3 charge is distributed over the entire ion, so the correct answer is A.
Answer: 7.8 moles of NaCl result from the complete reaction of 3.9 mol of
Explanation:
To calculate the moles :
As is the excess reagent,
is the limiting reagent as it limits the formation of product.
According to stoichiometry :
1 mole of gives = 2 moles of
Thus 3.9 moles of will give=
of
7.8 moles of NaCl result from the complete reaction of 3.9 mol of
Answer : Option D) the electrons in some metals pair up to create a magnetic field.
Explanation : Most of the metalsare magnetic in nature including some exceptions. When the unpaired electrons get aligned with the magnetic field they posses magnetism. Also there are some paired electrons in metals which align themselves according to the magnetic field and create magnetism in them.
The correct answer is C; Metals can become magnetic if they have many spinning electrons that create magnetic fields.
Further Explanation;
As long as there are many spinning electrons anything metal will become magnetic. Ferromagnetic is when there are only some certain types of metals that are attracted to magnetic. If you were to make an electromagnet, you would only need to take an insulated wire and wrap it around the metal that has ferromagnetic properties.
Learn more about magnetism at brainly.com/question/1228801
#LearnwithBrainly
(2) a beta particle (4) a gamma ray