Which number is equal to -906,060?
NEWS
-9.0606 x 105
-9.06 x 105
9.06 x 10-5
9.0606 x 10-5

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

The answer for #3 is c but i don't know why

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?