Which of the following statements describe chemical rather than physical properties?
Check all that apply
1. oxygen gas supports combustion
2. fertilizers help to increase agricultural production
3, water boils below 100 degrees C on top of a mountain
4. lead is denser than aluminum
5. uranium is a radioactive element
I chose 1 and 3 and it was incorrect.
Update:apparently it was 1,2,5
oh well
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1 A 2 b 3 39 4 c 5 c 6 c 7 and huh 9a huh 13=c? 14 b fudge, tough stuff, 20=d? 27? c? good luck to all intelligent and informed people . and?; also to people that feel. somehow; ? a balance must be found. sorry i flunked the test, oh well. stress management counts.
The answer is:
1. because combustion cannot be reversed and therefore is chemical
2. because growing also cannot be reversed making it chemical
The rest can be tested without destroying the sample.