InterviewSolution
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InterviewSolution
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2. The numbers of atoms of Cr and O are 4.8 x 1010 and9.6 x 1010, respectively. The empirical formula is( Cr,0(3) Cr O.4(2) CrO(4) Nonc of thesc |
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Answer» but how can write that mass of oxygen is 32? Oxygen has 8 protons and eight neutrons, so it's molecular mass is 16u. As the Periodic table shows, the atomic mass of O is just slightly less than 16, so round off to 16. The oxygen molecule is O2, so it's molecular mass is 2 X 16 = 32. 1 is the correct answer |
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