Which statement is true for a solution when its concentration of hydroxide ions becomes equal to the concentration of hydronium ions? (5 points)
It becomes more acidic.
It becomes more alkaline.
Its pH becomes equal to 0.
Its pH becomes equal to 7.

What’s the percent by mass of carbon in c10h14n2

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

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp