@[email protected]M to Science [email protected]English • edit-25 days ago[Partially incorrect, see comments.] Pens in Spacemander.xyzimagemessage-square151fedilinkarrow-up11.46Karrow-down135
arrow-up11.43Karrow-down1image[Partially incorrect, see comments.] Pens in Spacemander.xyz@[email protected]M to Science [email protected]English • edit-25 days agomessage-square151fedilink
minus-square@[email protected]linkfedilinkEnglish16•4 days agoit hasn’t been graphite for while now either….
minus-square@[email protected]linkfedilinkEnglish5•4 days agoRegular chalk is calcium carbonate. Crayola’s website says their sidewalk chalk uses calcium sulfate (gypsum as an ingredient in plaster of paris). So they’re both calcium salts.
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it hasn’t been graphite for while now either….
Chalk isn’t chalk?
Regular chalk is calcium carbonate. Crayola’s website says their sidewalk chalk uses calcium sulfate (gypsum as an ingredient in plaster of paris).
So they’re both calcium salts.
no