Answer:
The copper oxide can then react with the hydrogen gas to form the copper metal and water. When the funnel is removed from the hydrogen stream, the copper was still be warm enough to be oxidized by the air again.
Explanation:
Iron, but there are some amounts of other dense elements like gold, platinum, and uranium.
<span>A substance dissolves in water by breaking up into smaller pieces. these pieces of the same substance spread throughout the water. this process is known as d</span>iffusion.
In short, your answer would be : Diffusion.
Hope this helps !
Photon
