How many calcium atoms are in 51.0 g of calcium?
You need to find the amount of moles of Calcium you have in 51.0 g of Calcium. The atomic weight of Calcium is 40. So, 40 g of calcium has 1 mole. Find the number of moles 51 g of Calcium contains. Then, 1 mole contains 6.02×10^23 particles, in this case, 1 mole contains 6.02×10^23 atoms. When you have the number of moles, you can find the number of atoms! Post your answer.
