How many oxygen atoms are in 68.8mg Na₂S₂O₃ 5H₂O
1 answer:
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Answer: 480 kJ of energy is released when 3.5 mol of reacts.
Explanation:
The balanced chemical reaction is:
Thus it is given that the reaction is exothermic (heat energy is released) as enthalpy change for the reaction is negative.
1 mole of on reacting gives = 137 kJ of energy
Thus 3.5 moles of on reacting gives =
of energy
Thus 480 kJ of energy is released when 3.5 mol of reacts.
Among the given options, Option (D) that is O, will have the same number of protons. Hence option (D) is correct.
A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
In option (D), All the three species (O, ) bears 8 protons but the number of electrons varies.
In any Ion, there will be no change in number of protons among the same atoms but number of electrons varies.
Therefore, Option (D) has same atoms but different ions.
Hence, it has same number of protons. Thus the correct answer is option (D)
Learn more about Protons here ;
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