If you begin with 72 grams of Nickel, how many moles of Ni would you have?

Answer: 1.2 Moles of Nickel

Explanation:

So you have to transfer grams to moles.

You do this by dividing your beginning mass by the atomic mass of the element (found on the periodic table).

1 mole is equal to the atomic mass of the element. The atomic mass of Nickel is 58.6934 rounded to the proper significant figures will be 59.

72 Grams Nickel / 59 grams = 1.2 moles of Nickel