4. For the reaction whose balanced equation is as follows, find the number of grams of sodium that must react to produce 420 grams of sodium oxide.
4 Na + O2 → 2 Na,

10-14. (a) when 100.0 ml of weak acid ha were titrated with 0.093 81 m naoh, 27.63 ml were required to reach the equivalence point. find the molarity of ha. (b) what is the formal concentration of a- at the equivalence point? (c) the ph at the equivalence point was 10.99. find pk. for ha. (d) what was the ph when only 19.47 ml of naoh had been added?

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

Which statement describes james chadwick’s discovery.