Well if it were to freeze , the molecules move and become a solid slowly
40.0 g ( 1 mole ) --------------- 6.02x10²³ molecules
? ? --------------------------- 2.90x10²² molecules
mass = 2.90x10²² * 40.0 / 6.02x10²³
mass = 1.16x10²⁴ / 6.02x10²³
mass = 1.9269 g
hope this helps!
A mile.
For reference, it's about 1,607 or so meters, and 1km is 1,000.
5 sig figs! count everything after the decimal
