The final step in correctly matching ammunition to the fire arm is to MATCH THE INFORMATION ON THE BARREL WITH THE INFORMATION ON THE CARTRIDGE OR THE SHOT SHELL.
Getting the final step right is critical because if this final step is not properly carried out, an explosion can result, which can seriously injure the user and the bystanders or even kill them.
A chemical reaction occurs when reactant particles collide with proper energy and proper orientation.
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Answer:
Increase the concentrations,
Decrease the surface area of NaOH (in case it's solid);
Use a catalyst;
Increase the temperature
Explanation:
Reaction rate depends on:
- the concentration of the reactants: the greater the concentration, the greater the rate, since more particles per unit volume will increase the probability of a successful collision leading to a reaction. We may then increase the concentration of NaOH or vinegar solution;
- the surface area of the solid reactant: in case we have NaOH in solid form, we may decrease the size of the crystals to increase the reaction rate. This is because the greater the area, the more particles are likely to collide with it;
- add a catalyst: catalysts increase reaction rate, in this problem, we don't need any catalyst, as this is an acid-base reaction that is relatively quick, a catalyst would decrease the activation energy barrier;
- increase the temperature: higher energy of the particles and a higher velocity of each reactant would increase the probability of a successful collision.
Answer:
Transition from n = 4 to n = 1 corresponds to shortest wavelength.
Explanation:
Process ![\mid \Delta n\mid =\mid \frac{1}{(n)_{final}^{2}}-(\frac{1}{n_{initial}^{2}})\mid](https://tex.z-dn.net/?f=%5Cmid%20%5CDelta%20n%5Cmid%20%3D%5Cmid%20%5Cfrac%7B1%7D%7B%28n%29_%7Bfinal%7D%5E%7B2%7D%7D-%28%5Cfrac%7B1%7D%7Bn_%7Binitial%7D%5E%7B2%7D%7D%29%5Cmid)
A 0.9375
B 0.75
C 0.0421
D 0.1875
According to Rydberg equation for electronic transition in H-like atoms:
![\frac{1}{\lambda }=R_{H}\mid (\frac{1}{n_{final}^{2}}-(\frac{1}{n_{initial}^{2}})\mid](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B%5Clambda%20%7D%3DR_%7BH%7D%5Cmid%20%28%5Cfrac%7B1%7D%7Bn_%7Bfinal%7D%5E%7B2%7D%7D-%28%5Cfrac%7B1%7D%7Bn_%7Binitial%7D%5E%7B2%7D%7D%29%5Cmid)
where,
is wavelength of light emitted or absorbed,
is Rydberg constant.
So, higher the value of
, lower will the corresponding wavelength of light.
Hence process A will be associated with shortest wavelength.