Answer:
Explanation:
Lead Monoxide: PbO
Nitric Acid: HNO3
PbO + 2 HNO3 ---> Pb(NO3)2 + H2O
Answer:
Option (B) is correct
Explanation:
Oxidation: 
Reduction: 
---------------------------------------------------------------------------
Overall: 
Nernst equation for this cell reaction at 
:
![E_{cell}=(E_{Sn^{2+}\mid Sn}^{0}-E_{Zn^{2+}\mid Zn}^{0})-\frac{0.059}{n}log\frac{[Zn^{2+}]}{[Sn^{2+}]}](https://tex.z-dn.net/?f=E_%7Bcell%7D%3D%28E_%7BSn%5E%7B2%2B%7D%5Cmid%20Sn%7D%5E%7B0%7D-E_%7BZn%5E%7B2%2B%7D%5Cmid%20Zn%7D%5E%7B0%7D%29-%5Cfrac%7B0.059%7D%7Bn%7Dlog%5Cfrac%7B%5BZn%5E%7B2%2B%7D%5D%7D%7B%5BSn%5E%7B2%2B%7D%5D%7D)
Where, n is number of electron exchanged and species inside third bracket represents concentrations in molarity.
Here, n = 2, 
and ![[Zn^{2+}]=2.5\times 10^{-3}M](https://tex.z-dn.net/?f=%5BZn%5E%7B2%2B%7D%5D%3D2.5%5Ctimes%2010%5E%7B-3%7DM)
So, plug in all the given values into above equation:
![0.660V=(-0.136V+0.76V)-\frac{0.059}{2}log\frac{2.5\times 10^{-3}M}{[Sn^{2+}]}](https://tex.z-dn.net/?f=0.660V%3D%28-0.136V%2B0.76V%29-%5Cfrac%7B0.059%7D%7B2%7Dlog%5Cfrac%7B2.5%5Ctimes%2010%5E%7B-3%7DM%7D%7B%5BSn%5E%7B2%2B%7D%5D%7D)
So, ![[Sn^{2+}]=4.2\times 10^{-2}M](https://tex.z-dn.net/?f=%5BSn%5E%7B2%2B%7D%5D%3D4.2%5Ctimes%2010%5E%7B-2%7DM)
As the value "0.059" varies from literature to literature and 
is most closest to 
therefore option (B) is correct.
Answer:
Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions
The empirical formula is a formula of a compound showing the proportion of each element involved in the compounds but it does not represent the total number of atoms in the compound. It is the lowest number of ratio between the elements in the compound. In order, to determine the actual number of the atoms or the molecular formula of the compounds, we make use of the molar mass of the compound.
<span>To
determine the molecular formula, we multiply a value to the empirical formula.
Then, calculate the molar mass and see whether it is equal to the one
given (104.1 g/ mol). From the choices, the only valid options are b, d and e.
</span> molar mass
1 CH 13.02
8 C8H8 104.16
6 C6H6 78.12
Therefore the correct answer is option B.
