Using the phase diagram for CO2, what phase is carbon dioxide in at -60°C and 15 atm pressure?
O A. Liquid
O B. At the melting point
O C. Gas
O D. Solid

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

Which description best characterizes the motion of particles in a solid?

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.