Hisham asked in Science & MathematicsChemistry · 7 years ago

# Mass of one molecule of a compound is 6 x 10^24 g . Calculate molecular mass of the compound.?

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• 7 years ago

Perhaps you mean that the mass of a molecule is 6.0x10^-24 grams. The molar mass is the mass in grams of 1 mole of molecules. So ....

(6.0x10^-24 g / 1 molecule) x (6.022x10^23 molecules / 1 mol) = 3.6 g / mol

But here's the problem. What "compound" has a molar mass of 3.6 g/mol? There isn't one.

Unless you want to consider H3 - trihydrogen. It turns out that H3^+ is a very abundant ion in interstellar space. But, its molar mass is 3.02 g/mol

There is one other possibility. Your 6x10^-24g has only one significant digit, and when we round the molar mass (3.6 g/mol) to one significant digit, we get 4 g/mol, which is the molar mass of helium. Problem solved...... (sort of).

• 7 years ago

Your question is not worded correctly - it is not possible for "Mass of one molecule of a compound is 6 x 10^24 g." Please recheck the exact wording of the original question and resubmit.