Problem data: P (momentum of a hydrogen molecule) = 2.6 * 10 ^ -23 kg * m / s.
Constants: M (molar mass of hydrogen) = 2 * 10 ^ -3 kg / mol; Na (Avogadro’s number) = 6.02 * 10 ^ 23 mol-1.
To find the speed of the considered hydrogen molecule, we will use the formula: P = m * V = N * M / Na * V, whence V = P * Na / (N * M).
Let’s make a calculation: V = 2.6 * 10 ^ -23 * 6.02 * 10 ^ 23 / (1 * 2 * 10 ^ -3) = 7.826 * 10 ^ 3 m / s.
Answer: The considered hydrogen molecule moves at a speed of 7.826 * 10 ^ 3 m / s.
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