Monday
November 24, 2014

Homework Help: gr. 12 chemistry

Posted by Sarah H on Saturday, May 24, 2008 at 4:49pm.

Hi, please check my work:
In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is:
4FeS = 7O2 --> 2Fe2O3 + 2SO2
Calculate the % yield.

My Answer:
nFeS=23.4g/87.92 g/mol
=0.266 mol

4mol FeS / 0.266 mol = 7mol O2/ x02
xO2=0.466 mol

mFe2O3 = nXM
= 0.466 mol x 159.7 g/mol
= 74.4 g

% yield = actual yield / theoretical yield X 100%
=16.5 g/74.4 g x 100%
=22.2%

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

grade 12 chem - check my answer again please - Hi, please check my work: In an ...
Chemistry - please help - Hi, please check my work: In an experiment, 23.4 g of ...
Chemistry - please help - Hi, please check my work: In an experiment, 23.4 g of ...
Chemistry - Please be specific. In an experiement 23.4 g of iron sulphide, FeS ...
Chemistry - Bob Pursley - Posted by Sarah H on Friday, May 23, 2008 at 8:10pm. ...
chemistry - In an experiement 23.4 g of iron sulphide are added to excess oxygen...
chemistry check - please check Write the balanced equation, with the enthalpy ...
Chemistry - 4 FeS(s) + 7 O2(g) ==> 2 Fe2O3(s) + 4 SO2(g) 7.82 moles of FeS ...
physical science - When iron metal reacts with oxygen, the reaction can form ...
science - FeS+HC1--->FeC1(2)+H(2)S. what is the balanced equation thanks. ...

Search
Members