what is the freezing point depression of a solution containing 3mol of mgc12 dissolved into 300g of h2o

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

When the mercury level in a barometer decreases that atmospheric pressure has

I’m an electrically neutral atomic any element, there are equal numbers of