How do I determine the number of atoms in 30.0 g of K

Molarity is moles of solute over liters of solution. idk if that is what you are talking about, but you can convert moles of solute to grams of solute using dimensional analyzes by using molar mass found on the periodic table.

Ibelieve the answer is b.2200 watts, because p=vi; p=220(10); then p=2200hope my answer has you : )

The answer is c.  h+  and oh−  react to form water (h2o). i just took the test and i got it right. hope this !