Under similar conditions which of the following gases will diffuse four times as quickly as oxygen ?

Options

A. He
B. H2
C. N2
D. D2

Explanation

To determine which gas will diffuse four times as quickly as oxygen under similar conditions, we can use Graham's law of diffusion. Here’s the step-by-step solution:

### Step 1: Understand Graham's Law of Diffusion
Graham's law states that the rate of diffusion of a gas is inversely proportional to the square root of its molar mass. Mathematically, it can be expressed as:
\[ \frac{R_1}{R_2} = \sqrt{\frac{m_2}{m_1}} \]
where \(R_1\) and \(R_2\) are the rates of diffusion of gas 1 and gas 2, and \(m_1\) and \(m_2\) are their respective molar masses.
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