Which of the following pairs does not share the same empirical formula?

a.) ch2o and c3h6o3
b.) pbcl2 and pbcl4
c.) no2 and n2o4
d.) c3h12 and ch4

Who were some of the first people to use prostheses?

Which did president carter refuse to do in his attempt to free american hostages taken by iran?

Imagine that you are putting together a time capsule for future generations. it will be buried and then unearthed in the year 3000. you want to place in it the items you feel best document your life and times. they can be personal items or items that relate to your larger community. name six items you would include. they can be objects, writing, or something in an audio or visual format. what would you include and why? describe each item in one or two sentences mentioning what it is and how it could future generations learn about your life and times.