D. Ionic compound
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Answer is: there is 1,368·10²⁵ atoms of carbon.
N(C₃H₈) = 4,56·10²⁴.
From molecular formula: in one molecule of propane there is three atoms of carbon:
N(C) = 3 · 4,56·10²⁴.
N(C) = 1,368·10²⁵.
Table salt is a simple crystal of sodium chloride. Sugar is a complex carbohydrates molecule.
There’s lots of measurements. (m, kg, s, mol, cm, in, mm) etc