A 0.234 g sample of an ore is analyzed for Iron and found to contain 0.720 mg Fe203. How many Fe*3 parts per million (ppm) exist in this ore. (Round your decimals to closest integer)

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions