“10.00mL of a sample of concentrated hydrochloride acid is diluted to 100.00mL. If a 20.00mL portion required 15.23mL of 1.5 M NaOH to reach the endpoint, what is the concentration of the original, undiluted HCl?” I thought I knew what I was doing here but I ended with 114 M HCl. Can anyone point me in the right direction?

Matches the chemical name of each oxide of phosphorus to its chemical formula

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

How does the digestive system interact with the circulatory system? a. messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system. b. nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system. c. nutrients and gases are absorbed by organs in the circulatory system. then, they are transported to all parts of the body by organs in the digestive system. d. oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.