High School

How many grams of Fe\(_2\)O\(_3\) are there in 1.00 mole of Fe\(_2\)O\(_3\)?

A. 160.9 g
B. 51.99 g
C. 63.8 g
D. 79.9 g
E. 35.9 g

Answer :

The number of grams of [tex]Fe_{2} O_{3}[/tex] in 1.00 mole of Fe2O3 is 159.7 g which was calculated from the given values.

To determine the number of grams of [tex]Fe_{2} O_{3}[/tex] in 1.00 mole of Fe2O3, we need to know the molar mass of [tex]Fe_{2} O_{3}[/tex].

The molar mass of [tex]Fe_{2} O_{3}[/tex] can be calculated by adding up the atomic masses of its constituent elements, iron (Fe) and oxygen (O):

Fe: atomic mass = 55.85 g/mol

O: atomic mass = 16.00 g/mol

The molar mass of [tex]Fe_{2} O_{3}[/tex] = (2 x Fe atomic mass) + (3 x O atomic mass)

= (2 x 55.85 g/mol) + (3 x 16.00 g/mol)

= 111.7 g/mol + 48.00 g/mol

= 159.7 g/mol

Therefore, 1.00 mole of Fe2O3 weighs 159.7 grams.

The number of grams of Fe2O3 in 1.00 mole of Fe2O3 is 159.7 g.

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