Which of these equations represents a displacement reaction?

Copper + oxygen → copper oxide

Zinc + copper sulfate → zinc sulfate + copper

Sodium + water → sodium hydroxide + water

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?

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

What is the mass of 0.46 mol of mgcl2