Question

If one gram of carbon contains x atoms,what will be the no. of atoms in 1gram of magnessium

Answer 1

Answer:

x/2

Explanation:

the ratio of atoms in a carbon and magnesium will be the same as the ratio of their moles,so first of all we have to find :

1.moles of carbon in 1g of carbon

2.moles of magnesium in 1g of magnesium

a)1 mole of C=gram atomic mass of C=12

12 g of C=imole

∵1g=1/12 mole

thus,we have 1/12 mole of C elemenr and it contain x atoms.now ,since an eqaul number of moles of all element contain of atom,so 1/12 moles of Mg will also contain x atoms of Mg

b) 1 mole of Mg =gram atomic mass of =24g

now, 24g of Mg=1 moles

so, 1 g of Mg =1/24 mole

we know that :1/12 mole of Mg contains=x atoms

so,1/24 mole of Mg contains=x*12/24

   =x/2 atoms.