What word or two-word phrase best describes the shape of the ammonia ( nh3 ) molecule?

What is the formula for the molecular compound nitrogen monoxide

What is the mass of 0.46 mol of mgcl2

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)