1. (4 pts.) In 2018 the Michigan Department of Environment, Great Lakes, and Energy tested the water in 30 homes in Benton Harbor, MI. Eight out of 30 of the homes tested
had Pb2+ concentrations higher than 15 ppb. Remember a ppb is one microgram per
liter (1 ug/L). Change 15 ppb of Pb2+ into g/L and moles/L. Show all your work below!

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.