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What is the formula mass (molar mass) of cholesterol (C27H46O), a fat found in your blood and cell membranes? 19 g/mol 130 g/mol 260 g/mol 386 g/mol.

Sagot :

Answer:

386.66 g/mol  

Explanation:

To calculate the molar mass of a molecule, you add up the molar masses of its atoms.

Thus, for cholesterol. we get

27C = 27 × 12.011  =  324.297 g

46H = 46 ×   1.008 =    46.368

 1O =    1 × 15.999 =   15.999

                TOTAL = 386.655  g

To two decimal places, the molar mass of cholesterol is 386.66 g/mol

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