Which compound has an expanded 'octet'? carbon tetrachloride, CCl4

nitrogen trichloride, NCl3

sulfur hexafluoride, SF6

nitrogen dioxide, NO2

6. Which compound does not obey the 'octet' rule?
A. carbon dioxide

B. phosphorus trichloride

C. boron trichloride

D. carbon monoxide

these are 2 different questions

Sex cells from female reproductive organ? 1) mitosis 2) fertilization 3) zygote 4) eggs 5) meiosis 6) sperm

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

Heat is the total potential energy of a substance that can be transferred. true false