How many moles of oxygen atoms are present in 2.0 grams of oxygen gas, o2?

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?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Based on its chemical properties, identify the position of each chemical family on the periodic table.