Which statement describes a physical change?
Iron combines with oxygen to form rust.
Calcium is added to acid and hydrogen gas is produced.
Sodium metal reacts explosively with oxygen.
Lead is heated and becomes more viscous.

Question

Which statement describes a physical change?
Iron combines with oxygen to form rust.
Calcium is added to acid and hydrogen gas is produced.
Sodium metal reacts explosively with oxygen.
Lead is heated and becomes more viscous.

anonymous · Answer

http://openstudy.com/study#/groups/Chemistry Which one does not involve a chemical reaction?

anonymous · Answer

@CliffSedge duude , i need the answer really bad. common , i'll give you the best response if you give me the answerr.

kinggeorge · Answer

OpenStudy discourages seeking for answers, and giving answers. Please keep this in mind while you use this site. Thanks.

anonymous · Answer

I am immune to bribes, sorry.

anonymous · Answer

freakinn aye man . bye