Answer:
<h2>6 m/s</h2>
Explanation:
The speed of the man can be found by using the formula
![v = \frac{d}{t} \\](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7Bd%7D%7Bt%7D%20%20%5C%5C%20)
d is the distance
t is the time taken
From the question we have
![v = \frac{30}{5} \\](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7B30%7D%7B5%7D%20%20%5C%5C%20)
We have the final answer as
<h3>6 m/s</h3>
Hope this helps you
3Zn + 8HNO3 ---> 3Zn(NO3)2 + 4H2O + 2NO IF IT IS COLD AND DILUT NITRIC ACID .
IF IT IS HOT AND CONCENTRATED THEN:
Zn+ 4HNO3 ---> Zn(NO3)2 +2H2O +2NO2
The cell notation is:
![Mg(s)|Mg^{+2}(aq)||Ag^{+}(aq)|Ag(s)](https://tex.z-dn.net/?f=Mg%28s%29%7CMg%5E%7B%2B2%7D%28aq%29%7C%7CAg%5E%7B%2B%7D%28aq%29%7CAg%28s%29)
here in cell notation the left side represent the anodic half cell where right side represents the cathodic half cell
in anodic half cell : oxidation takes place [loss of electrons]
in cathodic half cell: reduction takes place [gain of electrons]
1) this is a galvanic cell
2) the standard potential of cell will be obtained by subtracting the standard reduction potential of anode from cathode
![E^{0}_{Mg}=-2.38V](https://tex.z-dn.net/?f=E%5E%7B0%7D_%7BMg%7D%3D-2.38V)
![E^{0}_{Ag}=+0.80V](https://tex.z-dn.net/?f=E%5E%7B0%7D_%7BAg%7D%3D%2B0.80V)
Therefore
![E^{0}_{cell}=0.80-(-2.38)=+3.18V](https://tex.z-dn.net/?f=E%5E%7B0%7D_%7Bcell%7D%3D0.80-%28-2.38%29%3D%2B3.18V)
3) as the value of emf is positive the reaction will be spontaneous as the free energy change of reaction will be negative
Δ![G^{0}=-nFE^{0}](https://tex.z-dn.net/?f=G%5E%7B0%7D%3D-nFE%5E%7B0%7D)
As reaction is spontaneous and there will be conversion of chemical energy to electrical energy it is a galvanic cell.
Answer:
i and ii
Explanation:
In the aerobic oxidation of glucose, the electrons formed are transferred to O2 after several others transfer reactions like passing through coenzymes NAD+ and FAD
Answer:- 1.90 atm
Solution:- It is based on combined gas law equation, PV = nRT
In this equation, P is pressure, V is volume, n is moles of gas, R is universal gas constant and T is kelvin temperature.
If we divide both sides by V then:
![P=\frac{nRT}{V}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7BnRT%7D%7BV%7D)
We know that, molarity is moles per liter. So, in the above equation we could replace
by molarity, M of the gas. The equation becomes:
P = MRT
T = 20 + 273 = 293 K
M = ![7.9*10^-^2](https://tex.z-dn.net/?f=7.9%2A10%5E-%5E2)
Let's plug in the values in the equation:
P = ![(7.9*10^-^2)(0.0821)(293)](https://tex.z-dn.net/?f=%287.9%2A10%5E-%5E2%29%280.0821%29%28293%29)
P = 1.90 atm
So, the pressure of the gas is 1.90 atm.