Many chemisty conferences have held a 50- trillion angstrom run (two significant figures). how long is this run in kilometers and in miles? (1 a = 1 x 10-10m)

The run is 5.0 km or 3.1 mile long

Explanation:

1 trillion =

So, 50 trillion =

So,

So,

So,

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."