Experiments are (1) done to learn something or discover if something works or (2) . Before conducting such experiments, one must know how to use the (3) . Some of these are (4) . It is also important to be aware of the (5) so as to avoid accidents. The different (6) will help the researcher too, to carry out a correct experiment like (7) . In addition, knowing and understanding the rules for studies with (8) , (9) and (10) ensure strict compliance with the international guidelines and regulation on biosafety.

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

Stage in which a typical star has completely stopped fusion

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant