How much water should be added to 85 ml of 0.45 m hci to reduce the concentration to 0.20 m?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions