P4O10 (s) + 6H2O(l) → 4 H3PO4(aq)

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Butterfly wingspan is 7.7

13) a 14) a15) b16) i don't know sorry17) a (maybe)