<span>There are currently a number of active and erupting volcanos. I believe that they are contributing to global warming and man is also contributing to global warming. We are already seeing melting of polar ice and polar bears are being threatened because their environment is changing and they are having a difficult time adapting. I come from Hawaii which has an active volcano. The volcano is located on the island of Hawaii where it has already claimed hundreds of miles of homestead. It is also flowing into the ocean. I live on the island of Oahu and often times the volcanic ash (called Vog) is carried over in the southern winds. The most serious affect is on the lungs and eyes. I have trouble breathing when Vog comes and I feel fatigued. I believe long term volcanic eruptions will change our world for the worse along with other contributors to global warming.</span>
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:
I have made it in above figure hope it helps
First, we will get the "n", the number of half lives, it is the elapsed time over the half life. In the problem, the time is measured in days, so we have
6/2 = 3
to get the ending amount of radioactive sample, we have
32g x (1/2)³ = 4 grams of radioactive sample ⇒ the amount left after 6 days
Answer: D) 2.41 m
Explanation:
Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.
where,
n = moles of solute
= weight of solvent in kg
moles of solute =
volume of solution = 1L = 1000 ml (1L=1000ml)
Mass of solution=
mass of solute = 292 g
mass of solvent = mass of solution - mass of solute = (1108- 292) g = 816g = 0.816 kg
Now put all the given values in the formula of molality, we get
Therefore, the molality of solution will be 2.41 mole/kg
