What is the mass, in kilograms, of 2.46 x 1020 formula units of barium chloride?

How manyatoms of mercury are in 1.4214e+1 ml sample

In salt water solution, the salt is the blank

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)