Quic quick i need answer
how many grams are there in 3.4 x 10^24 atoms of He

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

Condensation happens when water vapor cools. true or false? ?