An unknown salt was dissolved in 1.97g of water. The temperature of the water decreased from 24.8C to 21.4C when 8mol were dissolved. What is the heat of solution in kJ/mol?

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Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit