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OpenStudy (kitten_is_back):
Which of these changes do not involve forming or breaking chemical bonds? A. burning and melting B. rusting and cutting C. burning and digesting D. boiling and melting d
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OpenStudy (kitten_is_back):
is d right @BrandonR and sorrry :DDDDDDDDDDDD
OpenStudy (michele_laino):
hint: rusting and cutting is a mechanical change
OpenStudy (yumyum247):
Indeed cutting and rusting is a physical change....
OpenStudy (kitten_is_back):
so its rusting an d cuting?
OpenStudy (michele_laino):
more precisely, rusting is a chemical reaction which involves a change of number of electrons between two elements
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OpenStudy (michele_laino):
yes! I think option B
OpenStudy (kitten_is_back):
i'll try it
OpenStudy (yumyum247):
sounds like your taking a test :"D
OpenStudy (kitten_is_back):
its worng and i;m doing k12 homework
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