Question

Calculate the mass of magnesium atoms which contains same number of atoms as in 8 gram calcium​

Answer 1

Answer:

4.9 Mg

Explanation:

Molar Mass of Magnesium (Mg): 24.31 g/ mol

Molar Mass of Calcium (Ca): 40.08 g/ mol

Avogadro's constant  =  6.022 x 10^23 particles of a substance per mol of that substance

8.0g Ca x 1 mol Ca/ 40.08 Ca x 6.022x 10^23 atoms of Ca/ 1mol Ca = 1.2 x 10^23 atoms of Ca

The number of atoms of Mg should be the same as the number of atoms of Ca, so:

1.2 x 10^23 atoms of Mg x 1mol Mg/ 6.022 x 10^23 atoms of Mg x 24.31g Mg/ 1mol Mg

= 4.9 Mg