The first one
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Answer:
Quantum Mechanical Model of Atom
The solution of the wave equation brings the idea of shells, sub-shells and orbitals. The probability of finding an electron at a point within an atom is proportional to the |ψ|2 at that point, where ψ represents the wave-function of that electron.
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Answer: -
Oxidation, Oxygen
Explanation: -
Burning of magnesium gives us magnesium oxide.
The chemical symbol of magnesium is Mg.
The chemical symbol of magnesium oxide is MgO.
So, the balanced chemical equation is
2Mg + O2 – 2 MgO.
We see that the element added is O Oxygen.
So, the reaction is oxidation.
In oxidation always, oxygen is the common element involved in all chemical reactions of this kind.
Answer:
C- convection (convectional current)
Explanation:
Convection occurs in fluids e.g gases and liquids. It is the prices by which heat energy is transferred in a fluid by the actually movement of the heated fluid.
It is also called convectional current when the term current is used in the question.
Answer:
Explanation:
Hello!
In this case, since the combustion of the hamburger released 335.4 kcal of energy and that energy is received by the calorimeter, we can write:
And the heat of the calorimeter is written in terms of the temperature change and the calorimeter constant:
Thus, given the released heat by the hamburger due to its combustion and the temperature change, Cv for the calorimeter turns out:
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