1. is 7,9-di-tert-butyl-1-oxaspiro[4,5]de ca-6,9-diene-2,8-dione toxic? and why 2. is 2-(2-butoxyethoxy)ethoxy , TMS derivative toxic and why?
3. is pentasiloxane, dodecamethyl toxic and why?

What is the formula for calcium iodide

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

Explain that newton first law,second law and third law of motion?