Question

) How many moles of tungsten atoms are there in 4.8 x 1025 atoms of
tungsten?

Answer 1

We'll use Avogadro's Number (6.022x10^23) in this equation:

4.8x10^25 atoms W x (1 mole/6.022x10^23 atoms) = 79.7 moles W

The given only contains 2 significant figures, so our answer should also only have 2 sig figs:

80 moles W,  OR   8.0 x 10^1 moles W

Answer 2

Here use of Avogadro's Number i e, (6.022 × 10^ 23)

in this equation:

4.8x10^25 atoms W(1 mole/ 6.022x10^23 atoms) =79.7 moles W

The given only contains 2 significant figures, so our answer should also only have 2 sig figs:

80 moles W, OR 8.0 × 10^ 1 moles W

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