Uranus is most similar in size and composition to
a. mars.
b. earth.
c. jupiter.
d. neptune.

Calculate the mass percent of hydrogen in methyl acetate

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

Explain how to convert from one unit to another in the metric system.