Equation is as follow,
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Oxidation:
3 CO → 3 CO₂
Oxidation state of C in CO is +2, and that in CO₂ is +4. So, carbon has lost 2 electrons per mole and 6 electrons per 3 moles hence,
3 CO → 3 CO₂ + 6 e⁻
Reduction:
Fe₂O₃ → 2 Fe
Oxidation state of Fe in Fe₂O₃ is +3 per atom, and that in Fe is 0. So, Iron has gained 3 electrons per atom and 6 electrons per 2 atoms hence,
Fe₂O₃ + 6e⁻ → 2 Fe
Result:
Iron in Fe₂O₃ has been reduced in this reaction and has played a role of oxidizing agent by oxidizing carbon from +2 state to +4 state.
Answer:
The grating spacing is 
Explanation:
From the question we are told that
The wavelength is 
The angle is 
The order of the spectrum is 
Generally in grating grating the condition for maxima to occur is

where d is the grating spacing
making d the subject of the formula

Substituting values


Answer:
It will float
Explanation:
Polystyrene is not dense and its light and full of air. It will float.
Answer:
Charles's law
Explanation:
The expression:
V1/T1 = V2/T2
represents Charles's law
The law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant".
So,
V1/T1 = V2/T2
Pressure and the number of moles are constant
V and T are the volume and temperature
1 and 2 are the initial and final states.
Answer:
Incomplete question: A student prepares a 0.54 mM aqueous solution of butanoic acid...
The answer is: The percentage of dissociation is 15.4%
Explanation:
Given:
Ka = 1.51x10⁻⁵
Concentration = 0.54 mM = 0.54x10⁻³M
The reaction is:
C₄H₈O₂ = C₄H₇O₂⁻ + H⁺
I 0.54x10⁻³ 0 0
E 0.54x10⁻³(1-x) 0.54x10⁻³x 0.54x10⁻³x
Where x is the degree of dissociation
![Ka=\frac{[H^{+}][C_{4}H_{7}O_{2}^{-} }{[C_{4}H_{8}O_{2} } \\1.51x10^{-5} =\frac{0.54x10^{-3}x^{2} }{1-x} \\x^{2} +0.028x-0.028=0\\x_{1} =0.154\\x_{2} =-0.182](https://tex.z-dn.net/?f=Ka%3D%5Cfrac%7B%5BH%5E%7B%2B%7D%5D%5BC_%7B4%7DH_%7B7%7DO_%7B2%7D%5E%7B-%7D%20%20%20%20%20%7D%7B%5BC_%7B4%7DH_%7B8%7DO_%7B2%7D%20%20%20%7D%20%5C%5C1.51x10%5E%7B-5%7D%20%3D%5Cfrac%7B0.54x10%5E%7B-3%7Dx%5E%7B2%7D%20%20%7D%7B1-x%7D%20%5C%5Cx%5E%7B2%7D%20%2B0.028x-0.028%3D0%5C%5Cx_%7B1%7D%20%3D0.154%5C%5Cx_%7B2%7D%20%3D-0.182)
We will choose the positive value
x = 0.154
The percentage of dissociation is 15.4%