How many moles are in 3.25 x 1025 molecules of H2O?

100mg magnesium reacts with 20ml of 1.0m hcl

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

Why is the bottom layer of a trophic pyrimid the