How many moles of iron, Fe, are produced with 156.1 grams of magnesium, Mg?

b. 4.28mol Fe

Explanation:

The chemical equation in this question is given as follows:

3Mg + Fe2O3 → 2Fe + 3MgO

According to the equation;

3 moles of Mg produces 2 moles of Fe

Molar Mass of Mg = 24.31g/mol

Mole = mass/molar mass

Mole = 156.1/24.31 = 6.42mol

If 3 moles of Mg produces 2 moles of Fe

6.42 moles of My will produce 6.42 × 2/3

= 12.84/3

= 4.28mol of Fe.

what are the óptions. pléase list them

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !