Monday
December 22, 2014

Homework Help: Chemistry

Posted by Brett on Friday, September 21, 2012 at 7:24pm.

I have 3 I don't understand how to do.

A 33.2 g of iron ore is treated as follows. The
iron in the sample is all converted by a series
of chemical reactions to Fe2O3. The mass of
Fe2O3 is measured to be 12.3 grams. What
was the percent iron in the sample of ore?
Answer in units of %


A 28.4288 g sample of impure magnesium car-
bonate was heated to complete decomposition
according to the equation
MgCO3(s) ! MgO(s) + CO2(g) .
After the reaction was complete, the solid
residue (consisting of MgO and the original
impurities) had a mass of 16.0467 g. Assum-
ing that only the magnesium carbonate had
decomposed, how much magnesium carbon-
ate was present in the original sample?
Answer in units of g

A 5.7 g sample of iron ore is treated as follows.
The iron in the sample is all converted by a
series of chemical reactions to Fe2O3. The
mass of Fe2O3 is measured to be 18.5 g. What
was the mass of iron in the sample of ore?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - A 28.6 g of iron ore is treated as follows. The iron in the sample ...
AP Chemistry - A 44.6 g of iron ore is treated as follows. The iron in the ...
AP Chemistry - A 40.3 g of iron ore is treated as follows. The iron in the ...
ap chemistry - A 25.2 g of iron ore is treated as follows. The iron in the ...
chemistry - A 46.9 g of iron ore is treated as follows. The iron in the sample ...
AP Chemistry - A 37.5 g sample of iron ore is treated as follows. The iron in ...
AP Chemistry - A 12 g sample of iron ore is treated as follows. The iron in the ...
AP Chemistry - A 7.6 g sample of iron ore is treated as follows. The iron in the...
chemistry - A 12.8 g sample of iron ore is treated as follows. The iron in the ...
AP chemistry - A 28 g sample of iron ore is treated as follows. The iron in the ...

Search
Members