HELP FAST ITS MULTIPLE CHOICE WILL MARK BRAINLIEST!! Shells can also be called (choose all that apply)...

Question 4 options:

circles

energy levels

rings

spheres

Match the name of the following compound:   mgso4  · h2omagnesium sulfate monohydratemagnesium (ii) sulfate monohydratemagnesium (ii) sulfate hydratemagnesium sulfate hydrate

Find the mass in grams of 1.37x1020 particles of h3po4

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.