A bear is tied to a point in the center of a large yard, so the area the bear is able to explore is circular. The chain is 20 feet long. What is the area of the region the is able to explore?

Drive down any three characteristic of modern periodic table

For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with ph. if the solubility does change, pick the ph at which you'd expect the highest solubility. you'll find ksp data in the aleks data tab. compounds does solubility change with ph

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?