9. Write your observations on a sheel of paper. Questions:
1. What do you observe on the wall when light strikes an object in the dark room? Describe what you
observed.
2. Did you get the same result outside the house? Why?
3. What did you observe when light strikes a clear plastic sheel? What was formed and why?
4. Based from your observation, what are shadows?
5. How are shadows formed?
6. Do all objects form shadows? Why?​

What is the mass of 0.46 mol of mgcl2

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

In the haber reaction, patented by german chemist fritz haber in 1908, dinitrogen gas combines with dihydrogen gas to produce gaseous ammonia. this reaction is now the first step taken to make most of the world's fertilizer. suppose a chemical engineer studying a new catalyst for the haber reaction finds that 671 liters per second of dinitrogen are consumed when the reaction is run at 271c and 0.99atm. calculate the rate at which ammonia is being produced. give your answer in kilograms per second. round your answer to significant digits.