Examlex
It is adequate for the classroom teacher to provide specific directions to ensure that the students will be able to accomplish the assigned homework tasks.
Orpiment
A natural mineral composed of arsenic sulfide (As2S3), historically used as a pigment and with various industrial and medicinal applications.
Soluble Sulfide
A compound containing the sulfide ion that is soluble in water, often producing hydrogen sulfide gas upon contact with acid.
Arsenic
A toxic metalloid element with the symbol As and atomic number 33, known for its various allotropes and compounds.
Calcium Oxalate
A chemical compound that forms needle-shaped crystals and is a common constituent of kidney stones in the human body.
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