Using the chemical equation provided, calculate the number of moles of hydrogen sulfide produced when 0.28 mol of aluminum sulfide and 1.30 mol of water react. nearest hundreths.
Al2S3 + 6H2O à 2Al(OH)3 + 3H2S

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)