How many molecules are there in a 3.46-g sample of HCl?
(a) 6.022 x 1023 molecules
(b) 5.71 x 1022 molecules
(c) 9.48 x 1023 molecules
(d) 36.46 molecules

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

What term describes technology that operates on an atomic level

Ab c or d ? i’m not sure what the answer is