Answer :
Final answer:
To find how many atoms there are in a certain weight of an element, we calculate the number of moles present and then multiply by Avogadro's number. In this example, 151g of calcium contains approximately 2.27x10^24 atoms.
Explanation:
To find out how many atoms are in 151g of calcium, you need to use the concept of the mole which is a central concept in chemistry. One mol of any substance contains 6.022x10^23 entities (in this case, atoms). This number is known as Avogadro's number.
Firstly, we need to find out how many moles of calcium are in 151g. The atomic weight of calcium is approximately 40g/mol. Therefore, you can calculate the number of moles using the equation: moles = mass/atomic weight = 151g/40g/mol = 3.775 mols.
Secondly, to find out the number of calcium atoms, you multiply the number of moles by Avogadro's number: atoms = moles * Avogadro's number = 3.775 mols * 6.022x10^23 = approximately 2.27x10^24 atoms.
Therefore, there are approximately 2.27x10^24 atoms in 151g of calcium.
Learn more about Atoms in Calcium here:
https://brainly.com/question/31478589
#SPJ3
