How many moles are in 23 grams of phosphorus?

In order to determine the amount of moles in 23g of phosphorus, you must use math.

To get the answer, you must multiply the molar mass of phosphorus, which there is 30.97g in 1 mol, and put the mol over the mass, then multiply by your desired amount you want, which is 23g; it would look like this:

(23.00g)( 1 mol  = x

             30.97g )

Then you plug the answers into a calculator and you should get the answer of 0.74265.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6