How do you calculate the number of formula units for 6.82 X 10 -6 mol of lead(II) nitrate.

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.