<span>In the year 1784, Thomas Jefferson (third president of the United States of America) directed in the state of Virginia, USA the first ever controlled excavation of an olden burial mound. This is known to be the first scientific archaeological excavation in history. </span>
Slaves were shipped to the New World
Three main motivations for European exploration are the need to spread their religion (Christianity), improving the economy (acquiring more spices,gold,goods) and lastly, faster trading routes. Hope this helped :))
Hess's law allows you to find the net enthalpy of the magnesium combustion by adding the enthalpies of intermediate reactions. The <span>Hess's </span>Law<span> of Constant </span>Heat Summation states that<span> the total enthalpy change for the reaction is the sum of all changes</span> (no matter how many stages the reaction has).
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