The heat absorbed when 2.8 mol NH₄NO₃ is dissolved in water is 71.96 kJ.
<h3>What is heat?</h3>
Heat is the transportation of energy to or from a thermodynamic system.
By the formula of heat

Where n = moles
Delta Hrxn is molar heat
q = heat
Putting the values in the equation

Thus, the heat absorbed when 2.8 mol NH₄NO₃ is dissolved in water is 71.96 kJ.
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Answer:
Assuming the options found elsewhere, one of the achievements of pre-Columbian (i think you mean Mesoamerican, not "mess") cultures would show that they had intensive architecture, which they sustained through intensive agriculture.
Explanation:
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In order to get good results in relation to observing water pressure at fixtures, it is good inspection procedural practice to inspect the plumbing fixtures at the "pressure gauges"
<h3>What is plumbing fixtures?</h3>
Plumbing fixtures are the devices that can be linked with a plumbing system to deliver fluid or drain it.
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It is common practice for these system to be fitted with a pressure gauges.
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