What volume of Co2 (carbon (iv) oxide)will be produced when 10g of Na2Co3(sodium trioxocarbonate (iv) reacted with excess Hcl (Hydrogen Chloride) at STP(Na=23, C=12, O=16)

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 approximate vapor pressure when the gas condenses at 70 degrees celsius

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?