PERFECT RESPECT TO TEACHER PLEASE CLICK ON PHOTO. just answer. I will mark the answer brain list and you follow me.but first follow........ 1.WHAT IS GYPSUM
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO₄·2H₂O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard/sidewalk chalk,and drywall.
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Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO₄·2H₂O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard/sidewalk chalk,and drywall.
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