The answer is A. use casual, friendly conversation.
A teaspoon of caffeine is <em>NOT</em> deadly as teaspoon of ricin
I think its density is 850kg/m^3
Answer:
20 g/mol
Explanation:
We can use <em>Graham’s Law of diffusion</em>:
The rate of diffusion (<em>r</em>) of a gas is inversely proportional to the square root of its molar mass (<em>M</em>).

If you have two gases, the ratio of their rates of diffusion is

Squaring both sides, we get

Solve for <em>M</em>₂:


