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To prevent a condition called the “bends”, deep sea divers breathe a mixture containing, in mole percent, 10.0% O2, 10.0% N2 , and 80.0% He.
a. Calculate the molar mass of this mixture.
b. What is the ratio of the density of this gas to that of pure Oxygen?

Respuesta :

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1.       In order to prevent the condition called “bends”. He needs to calculate the Molar Mass of the mixture of 10.0% 02, 10.0 % N2 and 80 % He.
So the Answer is letter A. Calculate the molar mass of this mixture.
How to calculate:
Given Numbers : 10.0 % O2
                              10.0% N2
                               80 % He
Molar Mass = (.10 x 32g / mol.) + (.10 x 28g / mol.) + (.80 x 4g / mol.)
                          => 9.2g / mol.



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