# Is 0.50 percent equal to 0.5 g/mol or 0.50 g/mol?

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• 0.5% means 0.5 out of 100 or 0.005 out of 1.

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• neither

.. (1) 0.50% is a % whilst 0.5 g/mol and 0.50 g/mol are molar masses

.. . .. %'s are very weakly related to molar masses

.. (2) I seriously doubt you'll find any substance with a molar mass = 0.5 g/mol

.. (3) 0.50 has 2 sig figs.... 0.5 has 1 sig fig... 0.50 has 2 sig figs

.. .. . is there an operation you're doing and trying to find sig figs?

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• Anonymous
8 months ago

Maybe yes, maybe not.  Not enough information to tell you how many g/mole is 0.50 percent.

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• Percentage and molarity...

Are you asking about the significant digits, because there is no way to relate the amount in grams per mole of an unknown substance to a percentage.  Grams per mole is the units of molar mass, but could be related to other measurements.

0.50% has two significant digits

0.5 g/mol has one significant digit

0.50 g/mol has two significant digits

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