Nickel-63 is a radioactive element that decays to copper-63. Nickel-63 has a half-life of approximately 100 years. Vincent predicts that about 50 grams of a 200-gram sample of nickel-63 remains after 200 years. Is he correct? Why or why not? Explain.

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?

What is the relationship of air masses and the temperature of oceans?

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation