Answer : To find the molar mass of unknown gas we need to solve the equation of rate of diffusion and molecular weight of the gases, which is as follows;
here the mol wt of gas B is not known so we take it as '<em>x'
</em>on solving we get 7 X
/ 4.9 X
<em>
</em>mol. wt of unknown gas =
20.0 g
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The answer is A because I just answered it
The hypothalamus. <span>a region of the forebrain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems, and involved in sleep and emotional activity.
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I got the answer !!! is Ar :))))