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Chemistry, 21.06.2019 23:40
If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?
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If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml
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