A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?

A barrel of water weighs 60 pounds. What must you put in it for it to weigh 40 pounds?

A hole

A hole

Explanation:

put a hole in the barrel and let some water out

To convert grams to moles, we need the molar mass of the element or compound. remember you can determine the molar mass of a molecule by adding the atomic mass of each atom from the periodic table.

molar mass of Na= 23.0 g/ mol

130 g (1 mol Na/ 23.0 grams)= 5.65 moles or 6 moles.