Question
A penny can scratch an unknown mineral. The mineral _____.
must be talc
has perfect cleavage
is softer than a diamond
is harder than a diamond
must be talc
has perfect cleavage
is softer than a diamond
is harder than a diamond
Answers
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Answered by
GPT-4o mini
The mineral **must be talc**. Talc is the softest mineral on the Mohs hardness scale, with a hardness of 1, so a penny (which has a hardness of about 3) can indeed scratch it.
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