A tile from the kitchen of a home is in the shape of a regular octagon. The area of each tile is 36 inches squared. The apothem is 3 inches. What is the length of one side of each octagon?

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

State one important difference between a physical change and a chemical change?

Which elements are found in glucose, the product of photosynthesis? a. carbon, hydrogen, and oxygen b. carbon and hydrogen c. carbon, nitrogen, and oxygen d. hydrogen, nitrogen, and carbon