Question

calculate the number of moles of 8 g of iron​

Answer 1

Explanation:

11th

Chemistry

Some Basic Concepts of Chemistry

Law of Chemical Combinations

Calculate the number of iro...

CHEMISTRY

Calculate the number of iron atoms in a piece of iron weighing 2.8g. (Atomic mass of iron =56)

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ANSWER

Given that, weight of iron =2.8 g

Atomic mass= 56

moles of iron=

atomic mass

wt. of iron

=

56

2.8

=0.05 moles

1 mole =6.022×10

23

atoms

0.05 moles =6.022×0.05×10

23

atoms=3.0115×10

22

atoms

Answer 2

Answer:

Molecular mass of iron= 56

No of moles= Weight / molecular mass

Therefore No of moles = 8/56

= 0.14