Catalyst can speed up chemical reaction without being used up or involved in thr reaction..
Answer:
depends
Explanation:
if there was a picture i could help you
1 km is equal to 100,000 cm
and you need to divide it to 1 km so that you can get rid of the km.
Water was bored. He decided to go through the water cycle. He flew in the air as gas, then condensed into water again, and then rolled down into a river, only to find out that he would be stuck doing it forever
. The end