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For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have
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Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?
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Chemistry, 22.06.2019 07:30
The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.
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Chemistry, 22.06.2019 08:00
An observation that requires measurement is called quantitative observable or qualitative
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