Question

One atom of an element 'X' weighs 6.644 \times 10^{-23} \mathrm{g}6.644×10 −23
g. the number of gramatoms in 8 \mathrm{kg}8kg of its sample is

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sucharitanag07

24.05.2018

Chemistry

Secondary School

+5 pts

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One atom of element X weighs 6.644*10 to the power -23g. Calculate the number of gram atoms in 40 kg of it

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DSamrat Ace

Hey.

Here is the answer.

weight of 1 atom = 6.644×10^-23 g

so, no. of atoms in 40 kg

= 40×10^3 / 6.644×10^-23

= 6.02046 × 10^26 atoms

As, 1 gram atom = no. atoms in one mole = 6.02×10^23

so, no. of gram atom = 6.02046×10^26/6.02×10^23

=1000 gram atoms

Thanks.