Question

a compound contains 2.68% magnesium how many atoms of magnesium are present in 15 gram of the compound​

Answer 1

Answer:

Explanation:

As it is given that percentage of magnesium in compound = 2.68 %

thus amount of magnesium in 15 g of compound = 2.68 % of 15 g

=2.68100×15

= 0.402 g Mg

As 24 g Mg contain = 6.022×1023 atom

Number of atoms in 0.402 g Mg = 6.022×102324×0.402 = 1.041 ×1022 atoms