Chemistry, 22.09.2019 03:20 shealynh52

Considering the limiting reactant, what is the mass of iron produced from 80.0 g of iron(ii)oxide (71.55 g/mol) and 20.0 g of magnesium metal? feof)+ mg() fe)mgo6) a) 62

Answers: 1

Show answers

Answers

Answer from: aiken11192006

45.95 grams of iron

Explanation:

The reaction between FeO and magnesium metal is

$Fe^{II}O + Mg^{0} - Fe^{0} + Mg^{II}O$

1. The first step is verify that the equation is balanced. In this case it is balanced since the numbers of atoms of each element are equal in both sides of equation (for example we have 1 Fe atom in reactants and 1 Fe atom in products)

2. We need to calculate the limiting reactant

for that we need to calculate the number of moles of each reactant dividing the mass that we have by the respective molecular weight of the compound. $moles FeO = \frac{80 g}{71.55 g/mol}=1.118$ and $moles Mg = \frac{20}{24.305} =0.823$ the molecular weight of Mg (24.305) can be readed in the periodic table of elements.so we divide the moles by stoichiometry number (number in front of each compound in the equation) in this case is 1 for both reactants (that is we need 1 mol of FeO and 1 mol of Mg to produce 1 mol of Fe).The lower number obtained was 0.823 for Mg, so Mg is the limiting reactant.

3. We calculate the moles and the mass of Fe produced. The maximum number of moles of Fe that can be produced is given by the limit reactant. So we would use the moles of Mg to calculate the Fe produced.

We have 0.823 mol of Mg and the chemical equation shown above say that we need 1 mol of Mg to produce 1 mol of Fe, so with 0.823 mol of Mg we woud produce 0.823 mol of Fe ( $0.823 mol Mg *\frac{1 mol Fe}{1 mol Mg} = 0.823 mol Fe$ ). To convert from mol of Fe to grams of Fe we would multiply by the molecular weight of Fe 0.823mol*55.845 g/mol=45.95 g

(molecular weight of Fe is readed in the periodic table of elements). So it is produced 45.95 g of iron

Answer from: Quest

Ions gain or lose electrons

Answer from: Quest

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 15:30, kathleensumter4913

219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c → fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.

Answers: 1

continue

Chemistry, 22.06.2019 06:30, queenkimm26

What is the polyatamic ion of thiosulfate

Answers: 1

continue

Chemistry, 22.06.2019 08:00, flakko1899

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Answers: 1

continue

Chemistry, 22.06.2019 10:00, deena7

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Answers: 1

continue

You know the right answer?

Considering the limiting reactant, what is the mass of iron produced from 80.0 g of iron(ii)oxide (7...