Chemistry, 27.04.2021 19:00 caprisun1491

Which 2 minerals can be scratched by a diamond but not a quartz?

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Chemistry, 21.06.2019 22:30, sherifour

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

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Chemistry, 22.06.2019 06:00, coolkid2041

One does not belong why? ice, gold ,wood ,diamond and table salt

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Chemistry, 23.06.2019 06:30, aurikmah2005

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.

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Chemistry, 23.06.2019 10:30, genyjoannerubiera

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.