an electric current can be used to decompose, or break down, water into oxygen gas and hydrogen gas. this is an example of a
a. physical change
b. chemical change
c. change in state
d. pressure change
please tell me the answer and y that is the answer!!!
2007-12-09 07:44:11 · 5 answers · asked by ? 2 in Science & Mathematics ➔ Chemistry
Physical change:
Although some extensive properties (like shape, phase, etc.) of the material change, the material itself is the same before and after the change. The change can be “undone.”
Chemical change:
The substances present at the beginning of the change are not present at the end; new substances are formed. The change cannot be “undone.”
c and d are somewhat self explanatory...
the answer to your question is b
2007-12-09 08:00:23 · answer #1 · answered by Anonymous · 0⤊ 0⤋
b. chemical change, because ur turning the water into smething new, hydrogen and oxygen
2007-12-09 15:52:36 · answer #2 · answered by @rf 2 · 1⤊ 1⤋
I say B chemicla change. Because it cant be c becuase it would have to be like gas to solid. and physical change is something you can see. u cant see this change. and pressure change im not sure
2007-12-09 15:48:41 · answer #3 · answered by Anonymous 2 · 1⤊ 1⤋
What is happening to the water molecule?
2007-12-09 15:49:16 · answer #4 · answered by John R 7 · 0⤊ 2⤋
b. chemical change
2007-12-09 15:48:59 · answer #5 · answered by ferrous lad 4 · 1⤊ 1⤋