9. What is the volume (how many liters) are there in a 22.00-g sample of carbon dioxide (CO2)?
A.44.8 L CO2
B.11.2 L CO2
C.11.2g CO2
D.22.4L CO2

Iknow #2 is d. i just need to know why

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.

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?