pls help x Explain how the relative atomic mass and the mass number of elements are different, and hence why some elements have relative atomic masses that are not whole numbers. Thank you :)

Urea, co(nh2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. what is the maximum mass of urea that can be manufactured from the co2 produced by combustion of 1.00 x 104 grams of co2?

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases

What is the lowest number energy level where a d sublevel is found