How many molecules of water of water are in a 821.3 g sample

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.

Chortling is used to clean water. another possible atom that would also work is a. sodium b. sulfur c. bromine

Plzzz ? which stores information in discrete steps? a magnet and coil of wire compact discs plastic records amplified speakers