Betty needs to get to a class that is 225 meters away and she walks at 3m/s. How
much time will it take her to get to class?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

What will most likely happen when two bromine atoms bond together?