How many moles of chlorine are in 6.67x10^40 chlorine molecules put in scientific notation

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

Which three statements represent the benefits of performing experiments using computer simulations?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of