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:
i think they become metamorphic after a volcanic eruption
"Spanish conquistadors settled in the Caribbean in search of gold and riches to bring back for their country."
"Spanish conquistadors were explorer-soldiers who settled in the Caribbean with the aim to amass wealth and fortune. Christopher Columbus arrived in the Caribbean in 1492 and claimed the area for Spain. Spanish settlements began to sprout in the region in the following years. The Caribbean’s importance also included its strategic location.
From the early 17th century, non-Hispanic traders and settlers also arrived and established permanent colonies and trading posts in the various Caribbean islands, particularly in areas where Spanish power was weak or absent."
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If 3b - 4 = 2, then 3b = 6, or b = 2. If b = 2, then 2a + 3(2) = 12 2a + 6 = 12 2a = 6 and then a = 3.