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never [62]
3 years ago
12

Which statement is true about limiting reactants?

Chemistry
2 answers:
kvasek [131]3 years ago
4 0

Ans: B). The limiting reactant in a reaction is the first reactant to be completely converted to products.

In a chemical reaction, the limiting reagent is one with a lower number of moles. Thus, the limiting reactant will be consumed first and will dictate the amount of product that can be formed.

For example consider the reaction between 1 g of Mg and 2 g of O to form MgO

2Mg + O_{2} ---- 2MgO

# moles of Mg = \frac{mass of Mg}{atomic mass of Mg} = \frac{ 1 g}{24 g.mol-1} = 0.042 moles

# moles of Oxygen = \frac{mass of oxygen}{molar mass} = \frac{2}{32} =0.063 moles

since moles of Mg is less than that of oxygen, Mg will be the limiting reactant. Thus, it will be consumed first and will be completely converted into MgO.

Anna11 [10]3 years ago
3 0
B). The limiting reactant in a reaction is the first reactant to be completely converted to products.

Hope this helps you.
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