Determine the molarity of a solution formed by dissolving 4.00 moles of kbr in enough water to yield 3.00 l of solution.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.