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QUIZ #6 – Isotopes EXTRA ... Calculate the average atomic mass of strontium. c. The natural abundance for boron isotopes is 19.9% 10B and 80.1% 11B. Calculate boron ...
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Multiple choice questions on moles and equations quiz answers PDF covers MCQ questions on amount of substance, atoms, molecules mass, chemical formula and equations, gas volumes, mole calculations, relative atomic mass, solutions, and concentrations. Question. This is how you calculate the empirical formula of a compound: 1. Write down the mass of each element 2. Divide the mass by the relative atomic mass (Ar) of the element 3. Divide the numbers by the smallest number to get the ratio of elements 4. Put the ratios in their simplest forms. Answer.
On the other hand, if you know numbers of protons (p), neutrons (n) and electrons (e), you can calculate atomic number (Z), atomic mass (A) and charge (z) (equations (4-6)): Z = p (4) A = p + n (5)
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