Why magnesium, aluminium and iron metals cannot be identified by flame test

You are performing an experiment in a lab to attempt a new method of producing pure elements from compounds. the only problem is that you do not know what element will form. by your previous calculations you know that you will have 6.3 moles of product. when it is complete, you weigh it and determine you have 604.4 grams. what element have you produced?

Nonpoint source pollution is difficult to control because it

506g of hi produce how many grams of i2?