Why does the N2 molecule in this room have a greater average velocity than the O2 molecules in the same room?

What is the composition, in atom percent, of an alloy that consists of 4.5 wt% pb and 95.5 wt% sn? the atomic weights for pb and sn are 207.19 g/mol and 118.71 g/mol, respectively.(a) 2.6 at% pb and 97.4 at% sn(b) 7.6 at% pb and 92.4 at% sn(c)97.4 at% pb and 2.6 at% sn(d) 92.4 at% pb and 7.6 at% sn

There are main groups in the modern periodic table of elements

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)