Insulin contains Sulphur. Calculate the minimum molar mass of insulin:

Question

Insulin contains  Sulphur. Calculate the minimum molar mass of insulin:

Canvas Classes · Accepted Answer

Strategy:
 "Minimum molar mass" is a specific concept meaning the substance must contain at least one atom of the element in question. We set up a ratio: if  of S is in  sample, how much sample is needed for  (1 mole) of S?

Step 1: Define the condition
One molecule of insulin must have at least 1 atom of Sulfur. Mass of  atom of .

Step 2: Apply the percentage rule
By definition,  of the Insulin mass () must equal .

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