Question

calculate number of moles of iron atom in a iron piece of 1120 gram. atomic mass of iron is 56​

Answer 1

We know that 1 mole of iron = 6.02 * 10^23.

Given that It contains 10^22 atoms of iron = 10^22/6.02 * 10^23

                                                                      = 1/60.2

                                                                      = 0.0166 moles.

Therefore the number of moles = 0.0166 moles.

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Answer 2

Answer:-

iron is =56

$=(6.022×10 \sqrt{23} )$

$1g. = \frac{6.022×10 \sqrt{23} }{56}$

$2.8g. =6.022×10^23×2.8/56$

Atoms =3.011×10^22