What is one value of using ph instead of molar concentrations?

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)

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

Which of the following are in a chemical family a. ca, sc, k b. cu, ag, au c. so, ge, sb