Answer:
Balanced chemical equations only show formulae, not names. A balancing number, written in normal script, multiplies all the atoms in the substance next to it.
Answer:
Ionic solids
Explanation: Ionic solids—Made up of positive and negative ions and held together by electrostatic attractions. They're characterized by very high melting points and brittleness and are poor conductors in the solid state. An example of an ionic solid is table salt, NaCl.
Answer:
C(i) the elements are lead (Pb), nitrogen (N) oxygen (O). Lead is found as the Pb 2+ ion and nitrogen and oxygen form the nitrate ion NO 3 –. Its chemical formula is Pb (NO 3) 2.
C(ii) is +2 because the oxidation state of lead is +2. More Lead (II) trioxonitrate(v) is composed of lead ion and the nitrate ion.
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Answer : The rate of formation of 
is, 
Explanation : Given,
Rate of disappearance of 
= 
The given rate of reaction is,
The expression for rate of reaction :
![\text{Rate of disappearance}=-\frac{1}{2}\frac{d[NO]}{dt}=-\frac{d[Cl_2]}{dt}](https://tex.z-dn.net/?f=%5Ctext%7BRate%20of%20disappearance%7D%3D-%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7Bd%5BNO%5D%7D%7Bdt%7D%3D-%5Cfrac%7Bd%5BCl_2%5D%7D%7Bdt%7D)
![\text{Rate of formation}=\frac{1}{2}\frac{d[NOCl]}{dt}](https://tex.z-dn.net/?f=%5Ctext%7BRate%20of%20formation%7D%3D%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7Bd%5BNOCl%5D%7D%7Bdt%7D)
From this we conclude that,
![\frac{1}{2}\frac{d[NOCl]}{dt}=-\frac{d[Cl_2]}{dt}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7Bd%5BNOCl%5D%7D%7Bdt%7D%3D-%5Cfrac%7Bd%5BCl_2%5D%7D%7Bdt%7D)
![\frac{d[NOCl]}{dt}=2\times \frac{d[Cl_2]}{dt}](https://tex.z-dn.net/?f=%5Cfrac%7Bd%5BNOCl%5D%7D%7Bdt%7D%3D2%5Ctimes%20%5Cfrac%7Bd%5BCl_2%5D%7D%7Bdt%7D)
Now put the value of rate of disappearance of , we get:
![\frac{d[NOCl]}{dt}=2\times (4.24\times 10^{-2}M/s)=8.48\times 10^{-2}M/s](https://tex.z-dn.net/?f=%5Cfrac%7Bd%5BNOCl%5D%7D%7Bdt%7D%3D2%5Ctimes%20%284.24%5Ctimes%2010%5E%7B-2%7DM%2Fs%29%3D8.48%5Ctimes%2010%5E%7B-2%7DM%2Fs)
Therefore, the rate of formation of is,
