What is the molar mass of fe(no3)2?

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)

What does an electron configuration for an atom relate to the atoms placement on the periodic table

What is the source of continuous heat and energy that we receive from the sun