2na + 2h2o mc012-1.jpg 2naoh+h2, what mass of na is required to yield 22.4 l of h2 at stp? (the atomic mass of na is 22.99 u.)

Helium decays to form lithium. which equation correctly describes this decay?

What does an electron configuration for an atom relate to the atoms placement on the periodic table

Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.