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scZoUnD [109]
3 years ago
7

The scientific study of matter and the changes it undergoes is called

Chemistry
1 answer:
barxatty [35]3 years ago
5 0
A. Chemistry
The scientific study of matter and the changes it undergoes is called chemistry

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The answer for Plato users is C. It is the energy that is required to overcome mass defect.

From Plato "Nuclear binding energy is the energy that is required to overcome the energy that is used to keep the nucleus together, the mass defect."

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The activation energy for the reaction no2(g)+co(g)⟶no(g)+co2(g) is ea = 375 kj/mol and the change in enthalpy for the reaction
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Answer is: 600 kJ/mol.<span>
Chemical reaction: </span>NO₂(g) + CO(g) ⟶ NO(g) + CO₂(g).

<span> Ea(forward) = 375 kJ/mol.
Ea(reverse) = ? kJ/mol.
ΔH(reaction) = -225 kJ/mol; this is exothermic reaction.
The enthalpy change of reaction is the change in the energy of the reactants to the products.
ΔH(reaction) = Ea(forward) - Ea(reverse).
-225 kJ/mol = 375 kJ/mol - </span>Ea(reverse).
Ea(reverse)<span> = 600 kJ/mol.</span>

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Why isn't hydrogen considered an alkali metal ?
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