Question

atomic number (Z) of iron , Fe is 26 , atomic mass 56.

using the above informantion answer the following


1 mole of iron weights dash grams

7.4 mole of iron contains dash atoms

7.4 mole of iron weights dash grams

1 gram of iron contains dash atoms

1 atom of iron weights dash grams

1.2 x 1024 atoms of iron would be dash moles of iron

1.2 x 1024 atoms of iron weigh dash grams .


please teach me how to calculate this and show me the calculations done please

Answer 1

1 mole of iron = atomic mass in grams = 56 g

7.4 moles of any substance will have 7.4 × Avogadro number of atoms of that substance = 7.4 × 6 × 10^23

If one mole = 56 g, 7.4 mole = 7.4 × 56 g

One mole = 56 g

Therefore 1 g = 6 × 10^23 / 56

Atomic mass = 56 Da

1.2 × 10^24 / Avogadro number = 2

2 × 56 g = 112 g

Answer 2

Answer:

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