Generally, the least reactive elements in the periodic table are the noble gases. The group is made up of helium, neon, argon, krypton, xenon and radon. They are unreactive because their outermost shell is composed of eight electrons, so there is no need for them to react with any other element in order to attain stability. Every other element undergo chemical reactions in order to attain the stability of the noble gases.
Answer:
The answer to your question is 55.224 g of NiCl₂
Explanation:
I will solve it and then I compare the results.
Data
Volume = 0.8 l
Molarity = 0.531
substance = NiCl₂
Process
1.- Calculate the molar mass of NiCl₂
NiCl₂ = 59 + (35.5 x 2)
= 130 g
2.- Calculate the number of moles
Molarity = moles / volume
-Solve for moles
moles = Molarity x volume
-Substitution
moles = 0.531 x 0.8
-Result
moles = 0.4248
3.- Convert the moles to mass
130 g -------------------- 1 mol of NiCl₂
x -------------------- 0.4248 moles
x = (0.4248 x 130) / 1
-Simplifying
x = 55.224 / 1
-Result
x = 55.224 g of NiCl₂
4.- We need 55.224 g of NiCl₂ to prepare 0.8l of a solution 0.531 M.
You have similar results, just our molar mass is different.
If the volume of a system decreases the pressure will increase, shifting in the direction that gives smaller number of moles of gas molecules.(only applies to gas)
It would have THREE rings/energy levels. This is because of the amount of electrons each orbital can hold.
Answer:
The correct answer is - palatine tonsils
.
Explanation:
Palatine tonsils or more normally tonsils are the pair of soft tissue masses of highlighted secondary lymphatic tissue present on the lateral wall of the oropharynx in the tonsilar fossa just below to the soft plate. It is the lymphatic tissue that is located to inferior to the soft plate.
Thus, the correct answer is - palatine tonsils.
