CHEMiSTRY :What does it mean when an element is above an arrow?

0 ⤊

CHEMiSTRY :What does it mean when an element is above an arrow?

ANYONE PLEASE ASAP!? =]

2007-04-25 10:40:19 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

3 answers

It's a catalyst - not used up.

2007-04-25 10:43:05 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋

Can you give some context? Sometimes it could be a catalyst. Sometimes it implies the addition of another reagent. Some maybe even use that to indicate the reaction environment.

2007-04-25 10:45:03 · answer #2 · answered by Phil 5 · 0⤊ 0⤋

Usually the element means "in the presence of."

2007-04-25 10:54:05 · answer #3 · answered by Tim D 1 · 0⤊ 0⤋