What mass of iron(III) chloride contains 4.13 x 10^23 chloride ions?

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

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

Adilute aqueous potassium nitrate solution is