Question

mass of one atom of an element X is 6.644 into 10 power minus 23 gram calculate number of Gram atoms in 40 kg of the element

Answer 1

Mass of 1 atom =6.664 into 10 to the power minus 3 gram. 1 gram atom is equal to mass of one mole atoms is equal to 6.023*10-23 * mass of 1 atom. 6.023 * 10 to the power 23 into 6.664 into 10 to the power minus 2 3 is equal to 40.13 gram is equal to 0.004 kg .so the number of Gram atoms is 40 kg = 1000

Answer 2

Mass of the atom= 6.64*10^-23.

One gram atom is equivalent to one mole (i.e) 6.022*10^23 entities.

We know that ,

gram atom = mass of the substance / mass of single molecule.

Now we're going to find number of molecules in 1 gram atom of the substance.

That is,

Gram atom* mass of single molecule.

=(6.022*10^23)*(6.64*10^-23) = 40.

Which means 40g of the substance contains 1 gram atom.

Therefore 40kg( 40000g) of the element has 1000 gram atoms.