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aleksley [76]
4 years ago
11

Elements are identified by the number of

Chemistry
1 answer:
Papessa [141]4 years ago
6 0
The simplest way to use the periodic table to identify<span> an </span>element<span> is by looking for the </span>element's<span> name or elemental symbol. The periodic table can be used to </span>identify <span>an </span>element<span> by looking for the </span>element's<span> atomic </span>number<span>. The atomic </span>number of<span> an </span>element<span> is the </span>number of<span> protons found within the atoms of that </span>element<span>.</span>
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Answer:

\Delta H_{rxn3}=-162.5 kJ/mol

Explanation:

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Now we need to combine this two:

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The enthalpy of reaction:

\Delta H_{rxn3}=\Delta H_{rxn1}+ \Delta H_{rxn2}=122.8 kJ/mol-285.3 kJ/mol

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