<span> <span>It means that the amount of mass will stay the same after the change occurs.</span></span>
Answer: Hydrogen and Helium
Explanation: Hydrogen is made from from one proton and one electron, making them one of the simplest forms of elements in the universe. Combining hydrogen atoms creates helium, the second most common element in the Universe.
1) You need to get volume of both temperatures by using first attached formula V= Mass/Density

2) Using the second formula you get the height of 0 degree

(radius in cm is

3) Then with h1 you can easily get the height of 25 degrees
Subtract 943.5 cm - 939.2 cm, and obtain a rise in mercury height of 4.3 cm