Dakota company had net sales (at retail) of $260,000. at cost at retail beginning inventory $ 63,800 $ 128,400 cost of goods purchased 115,060 196,800 the above additional information is available from its records. use the retail inventory method to estimate dakota's year-end inventory at cost. (round cost ratio to the nearest whole percentage.)

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.

The fact that the total amount of energy in a system remains constant is a(n)

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c