Answer:
I2 + 2KCl ===> 2KI + Cl2 Oxidation number 0 +2 -2 2 -2 0
Explanation:
Magnesium dichromate is the correct name of the compound MgCr₂O₇.
<h3>What is Molecular Formula ?</h3>
The chemical formula that gives total number of atoms of each element in one molecule of a compound is called Molecular Formula.
<h3>What is Oxidation State ?</h3>
Oxidation state is also known as oxidation number. It is defined as the atom is equal to the total number of electrons which have been removed from the element in order to form chemical bond with other atom.
Magnesium dichromate contains the Magnesium ion and chromate ions. Magnesium ion is represented as Mg⁺². Oxidation state of magnesium is +2. The chromate ion is represented as Cr₂O₇⁻². Oxidation state of chromate ion is -2.
Thus from the above conclusion we can say that The correct name of the compound MgCr₂O₇ is Magnesium dichromate.
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The total energy released per gram of methane burnt is 119,941.3 J/g.
<h3>Energy absorbed by water</h3>
Q = mcΔθ
where;
- m is mass of water
- c is specific heat of water
- Δθ is change in temperature
Q = (500)(4.184)(68 - 25)
Q = 89,956 J
<h3>Total energy released per gram of methane burnt</h3>
0.3T = 89,956 J
T = 89,956 J/0.3
T = 299,853.3 J
Total energy per gram of methane, E = T.E/m
E = (299,853.3 J) / (2.5 g)
E = 119,941.3 J/g
Thus, the total energy released per gram of methane burnt is 119,941.3 J/g.
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Answer: 35.4 degrees
Explanation: because it cold
