Question

how many moles are present in 28g of iron​

Answer 1

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Answer 2

Given:-

→ Mass of Iron (Fe) = 28g

To find:-

→Number of moles present in 28g of Iron.

Solution:-

•Atomic mass of Iron (Fe) = 56u

We know that, molar mass of an element is the atomic mass in grams.

Hence, molar mass of iron is 56g.

No of moles = Given mass/Molar mass

= 28/56

= 0.5 mole

Thus, 0.5 mole is present in 28g of iron.

Some Extra Information:-

The molar mass of some elements are:-

• Hydrogen (H) = 1g

• Oxygen (O) = 16g

• Carbon (C) = 12g

• Chlorine (Cl) = 35.5g

• Sodium (Na) = 23g

• Potassium (K) = 39g

• Calcium (Ca) = 40g