Find the average atomic mass of neon, given the atomic masses and relative abundance of its three isotopes. ne-20: 19.992 amu; 90.48% ne-21: 20.993 amu; 0.27% ne-22: 21.991 amu; 9.25%a. 20.992 amub. 19.992 amuc. 20.1797 amud. 20.688 amu

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.