Physics, 20.09.2019 10:00 lilie080202

Which of these is caused by a chemical change?
a) the honey in a jar crystallizes and will no longer pour.
b) the skin of a banana turns from green to yellow as it ripens.
c) a box of powdered brown sugar turns into a solid brick over time.
d) the salt crystals in a shaker cake and will no longer pour
just the answer .

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Which of these is caused by a chemical change?
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