Question

the molar mass of iron(Fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?

Answer 1

Try this solution:

if 1 mole is 55.8 gr., then 2.25 moles the mass should be 55.8*2.25=125.55 gr.

Answer: 125.55 gr.

Answer 2

125.55g is the mass in grams of 2.25 moles of iron.

What are moles?

A mole is defined as 6.02214076 × $10^{23}$of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

$Moles = \frac{mass}{molar \;mass}$

$2.25 moles = \frac{mass}{55.8 g/mol}$

Mass = 125.55g

Hence, 125.55g is the mass in grams of 2.25 moles of iron.

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