Plz ! i will give brainliest! which of the following is true about an atom of iron and an atom of copper? a. they have different masses. b. both have the same properties. c. they have an equal number of protons. d. both have different types of sub-atomic particles.

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?

Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?

Is a pencil falling to the floor anon contact force, a force, or a contact force