Myoglobin stores oxygen for metabolic processes in muscle. Chemical analysis shows that it...

Question:

Myoglobin stores oxygen for metabolic processes in muscle. Chemical analysis shows that it contains .34% Fe by mass. What is the molar mass of myoglobin?

Molar mass:

The amount of a specific chemical in a chemical compound can be reported by a percent by mass. This value represents the percentage of that chemical present in the entirety of the compound. The mass of the compound can be used along with the mass percent to calculate the molar mass. Molar mass is reported as grams of the compound per mole.

Answer and Explanation:

% Fe by mass = 0.34%

The molar mass of Iron is 55.85 g/mol.

Myoglobin is a protein that has a heme group consisting of 1 iron atom in its center.

% mass Fe = mass Fe {eq}\div{/eq} molar mass of myoglobin {eq}\times 100{/eq}

Let x equal the molar mass of myoglobin:

{eq}0.34 = (55.85 \div x) \times 100{/eq}

x = 16,470

The molar mass is 16,470 g/mol


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What is Molar Mass? - Definition, Formula & Examples

from General Studies Science: Help & Review

Chapter 27 / Lesson 24
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