Answer:
26.6 s.
Explanation:
For a zero order kinetics, the formula is:
[A] = [A₀] - kt
where,
[A] = amount pr concentration left
[A₀] = initial concentration or amount
k = rate constant
t = time
concentration = mole/volume
[A₀] = 0.5/2.0
= 0.25 M
[A] = 0.25/2.0
= 0.125 M
k = 0.0047 Ms⁻¹
t = ([A] - [A₀]/-k
= (0.125 - 0.25)/(-0.0047)
= 26.60 s.
the amount is reduced by half after 26.6 seconds
Answer:
When ascorbic acid reacts with iodine then acid reacts to oxidize which means loose electron while iodine reacts to reduce which means gain electron.
Explanation:
We know that ascorbic acid which consists of vitamin C is very crucial for the growth of teeth, bone, etc. It also helps in regulating the chemical reaction of cells in the body.
When ascorbic acid reacts with iodine then acid reacts to oxidize which means loose electron while iodine reacts to reduce which means gain electron.
Chromatography is an analytical method of separating components of the mixture. Particularly, this method uses the paper chromatography. The color indicates the type of substance existing. Each substance is designated to one color only. So, if your paper showed more than one color, it mean that there is more than one component in there. Therefore, Kim's specimen contains more than one component because of the red and blue band.
Answer: The value of the equilibrium constant Kc for this reaction is 3.72
Explanation:
Equilibrium concentration of 
= 
Equilibrium concentration of 
= 
Equilibrium concentration of 
= 
Equilibrium concentration of 
= 
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as 
For the given chemical reaction:
The expression for is written as:
![K_c=\frac{[NO_2]^3\times [H_2O]^1}{[HNO_3]^2\times [NO]^1}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BNO_2%5D%5E3%5Ctimes%20%5BH_2O%5D%5E1%7D%7B%5BHNO_3%5D%5E2%5Ctimes%20%5BNO%5D%5E1%7D)
Thus the value of the equilibrium constant Kc for this reaction is 3.72
The force of gravity is the force with which massively large objects such as the earth attracts another object towards itself. All objects of the earth exert a gravity that is directed towards the center of the earth. Therefore, the force of gravity of the earth is equal to the mass of the object times acceleration due to gravity.
<span>F = ma </span>
<span>4.9N = m (9.8 m/s^2), note that N (newtons) = kg-m/s^2 </span>
m = 0.5 kg
<span>The mass of the object is 0.5kg.</span>
