D. physical change. It's kind of self explanatory because it's physically changing the quartz crystals into a sand. I hope this helps!
Answer from: Quest
answer: i dont know the answer but this might
explanation:
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Answer from: Quest
the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula
(that's what i know about formula mass)
Another question on Chemistry
Chemistry, 22.06.2019 10:30
Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2
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