Answer & Explanation:
The limiting significant figure in a calculation is our smallest figure. 1 g is one figure by using the significant figure rules. In the same manner we don't count zeros unless there is a non-zero number in front of it so .0001 g is still 1 figure.
So no we only know the unknown to one significant figure.
In order to calculate a molar mass of your unknown solid to three significant figures, this is what we need to do:
The limiting significant figure in a calculation is our smallest figure. 1 g is one figure by using the significant figure rules. In the same manner we don't count zeros unless there is a non-zero number in front of it so .0001 g is still 1 figure.
They are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value.
Thus, using significant figures we can calculate the molar mass of unknown solid as well.
Find more information about Significant figures here:
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