The Cl-Br molecule is an example of a substance that has a permanent dipole in the molecules. Explain why there is a dipole in this molecule. ​

Compare and contrast physical changes with chemical changes.

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

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)