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vagabundo [1.1K]
3 years ago
9

A. How many grams are in 9.62 x 10 23 atoms of Magnesium? ( the 23 is supposed to be the 23rd power)

Chemistry
1 answer:
Rufina [12.5K]3 years ago
5 0

Answer: 9841.26

Explanation:

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The enthalpy change : -196.2 kJ/mol

<h3>Further explanation  </h3>

The change in enthalpy in the formation of 1 mole of the elements is called enthalpy of formation  

The enthalpy of formation measured in standard conditions (25 ° C, 1 atm) is called the standard enthalpy of formation (ΔHf °)  

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)  

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\tt \Delta H_{rxn}=2.(-285.8)-2.(-187.8)\\\\\Delta H_{rxn}=-571.6+375.4=-196.2~kJ/mol\rightarrow \Delta Hf~O_2=0

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3 years ago
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