Derrell

How might the difference in the brightness of spectral lines be explained? Please please anyone help me...i have a lab and this is a question that i cannot find anywhere please help

1) Find out why certain gases such as HCl(g) and NH2(g) should not be collected over water. Can someone please help me with this answer, I have been searching but i cannot find a very accurate answer for my homework. Any help is appreciated. Thanks

can someone help me? 1) Suppose that a reaction was carried out in an open flask and the final mass was significantly greather than the initial mass. What would you conclude? 2) Suppose that a reaction was carried out in an open flask and the final mass was significantly less than the initial mass. What would you conclude?

thanks jowrose!

hi, im new here and can anyone of you tell me why nails react the way it does when it interacts with copper (II) chloride? thanks