Why does a big change in the pH occurs after adding some drops of titrant after the equivalence point ?

Why do cells appear different in distilled water than they do in 10% salt water?

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

Find the number of moles of argon in 364g of argon.