<span>Communication is the sharing of ideas and findings through writing and speaking, because you can process your experiment and collect data all you want, but until you share it with others and compare it with others, than is essentially useless. Open dialogue, open communications is where our ideas and findings really take form and become something worth while and productive to others.</span>
Answer:
The salt is Zn(NO3)2
When the residue is allowed to cool, its colour changes from yellow to white
The equation of the reaction is; 2Zn(NO3)2(s) --->2ZnO(s) + 4NO2(g) + O2(g)
Explanation:
Decomposition of Zn(NO3)2 is one of the routes by which ZnO is obtained. ZnO is a white insoluble powder which has a yellow colour when hot and a white colour when cold. It is an amphoteric substance used as a white pigment in paints and as a filler for rubber.
In a very pure form, it is used in cosmetic powders and creams as well as in medicinal ointments and lotions.
Also recall that NO2 is a brown gas and oxygen gas rekindles a glowing splint.
Answer:
<h2>0.041 M</h2>
Explanation:
The molarity of a solution when given the number of moles the substance and it's volume can be found by using the formula
![c = \frac{n}{v} \\](https://tex.z-dn.net/?f=c%20%3D%20%20%5Cfrac%7Bn%7D%7Bv%7D%20%5C%5C%20)
n is the number of moles
v is the volume in L
We have
![c = \frac{0.4}{9.79} \\ = 0.04058...](https://tex.z-dn.net/?f=c%20%3D%20%20%5Cfrac%7B0.4%7D%7B9.79%7D%20%20%5C%5C%20%20%3D%200.04058...)
We have the final answer as
<h3>0.041 M</h3>
Hope this helps you
<span>You have the answer and you don’t even know it. Just take the inverse of what one electron weights in grams (9.11E-28) to get the number of electrons in one gram. You should get an astonishing large number (1.10E+27). Just in case you do not recognize the notation it is scientific notation as a calculator would write it.</span>