Amachine shop worker records the mass of an aluminum cube as 176g. if one side of the cube measures 4 cm, what is the density of the aluminum

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

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)

Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6