Can someone pleas help me with these questions I really need the answer as soon as possible!! Calculate the pH of the following solutions:
a. 0.050 M HNO3 b. 1.0 M KOH c. 2.4x10-5 M NaOH

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate