How can you use the Periodic Table of Elements to help you find information about specific elements? PLZZZ HELP M

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

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