If 3.75 moles of aluminum react, how many moles of sulfur are needed? 16 Al + 3S8 --> 8Al2S3
0.70 mol

0.050 mol

20 mol

16 mol

Identify the electromagnets with poles that are reversed from the electromagnet shown above

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor

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