Un elemento tiene las siguientes abundancias naturales y masas isotópicas: 90,92% de abundancia con 19,99 amu, 0,26% de abundancia con 20,99 amu y 8,82% de abundancia con 21,99 amu. Cuál es su la masa atómica promedio de este elemento

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

Aflagpole broke in a storm. it was originally 8 1 81 feet tall. 2 8 28 feet are still sticking straight out of the ground, where it snapped, but the remaining piece has hinged over and touches the ground some distance away. how far away is the end of the pole from the base of the pole along the ground?

What is the value of x? enter your answer in the box. x =