Search results 3497 items matching your search terms. Filter the results Item type Select All/None Collection File Folder Image Link Movie Page Question Quiz Quiz History New items since Yesterday Last week Last month Ever Sort by relevance date (newest first) alphabetically An initial substance in a chemical equation Located in Chemistry / Chemical Reactions / Definitions A substance that acts as a catalyst in living organisms Located in Chemistry / Chemical Reactions / Catalysts A catalyst material used in ammonia synthesis process Located in Chemistry / Chemical Reactions / Catalysts A catalyst used in the cracking of petroleum process Located in Chemistry / Chemical Reactions / Catalysts A substance that increases the rate of a reaction without itself being consumed Located in Chemistry / Chemical Reactions / Catalysts Speeds up reactions of hydrogen gas with oxygen gas to make water (H2O) and electricity Located in Chemistry / Chemical Reactions / Catalysts The minimum energy needed for a particular chemical reaction to take place Located in Chemistry / Chemical Reactions / Catalysts A notation which is a straightforward expression of a number Located in Chemistry / Measurements / Measurements definitions Another name given to scientific notation Located in Chemistry / Measurements / Measurements definitions It is a notation to express a number using powers of 10 Located in Chemistry / Measurements / Measurements definitions < Previous 10 items 1 ... 48 49 50 51 52 53 54 ... 350 Next 10 items > Subscribe to an always-updated RSS feed.
