Answer:
Explanation:
A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
h2 + 02 = h2o
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Answer:
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Answer:
(a) The unit cell edge length <u>0.421 nm</u>
Explanation:
Lets calculate -:
Given -
density = 
Molecular weight of MgO = 24.31 +16

Avagadro number = 
In rock salt structure , there are four anions and four cations , hence Z=4 (Number of formula per unit cell)
Now, using the formula -

![a=[\frac{ZM}{N_Ad}]]^\frac{1}{3}](https://tex.z-dn.net/?f=a%3D%5B%5Cfrac%7BZM%7D%7BN_Ad%7D%5D%5D%5E%5Cfrac%7B1%7D%7B3%7D)
Now, putting the given values


= 0.421 nm
<u>Hence , the unit cell edge length = 0.421 nm </u>