How can I build potassium on PhET?

Avariable that is not being directly tested during an experiment should be

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

The solubility of barium nitrate is 9.02 g/100 g h2o at 20°c. a 15.2 g sample of barium nitrate is added to 200.0 g of water at 20°c. is the solution saturated, unsaturated, or supersaturated? a. unsaturated b. saturated c. supersaturated