Name three changes of state that can take place when energy is removed from a substance

When the volume and number of particles of a gas are constant which of the following is also constant

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

How many moles are contained in 5.6 l of h2 at stp