Question

Calculate average velocity of molecules of oxygen at 27°c

Answer 1

$v = \sqrt{ \frac{3rt}{m} } \\ r = 8.31 \\ t = 273 + 27 k\\ t = 300 k\\ m = 16 \\ v = \sqrt{ \frac{3 \times 8.31 \times 300}{16} } = \sqrt{ \frac{7479}{16} } \\ v = \sqrt{467.4375} \\ v = 21.62 \: m {s}^{ - 1}$
hope it helps.