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I need some help with my Chemistry 101 homework. Here are ...

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I need some help with my Chemistry 101 homework. Here are the questions.

I. Classify the following as homogeneous mixtures, heterogenous mixtures, elements or compounds.
a.water
b.shampoo
c.dry soup mix
d.salt water

II.Mixtures can be separated into their components by taking advantage of differences in the chemical properties of the components. Why might this separation method be less convenient than taking advantage of differences in the physical properties of the components?

Choose one from the following:
-a chemical property involves a chemical change so that you no longer have what you had.
-The chemical properties of the components of a mixture are too similar to each other.
-Chemical properties are not as apparent as are physical properties.
-The chemical properties of the components of a mixture are too different from each other.

III. Classify the following as element, mixture, or compound
a.table salt
b.stainless stell
c.table sugar
d.aluminum
e.ice
Submitted: 7 years ago.
Category: Homework
Expert:  NAL replied 7 years ago.

I. Classify the following as homogeneous mixtures, heterogenous mixtures, elements or compounds.
a.water - compound
b.shampoo - homogeneous mixture
c.dry soup mix - heterogeneous mixture
d.salt water - homogeneous mixture

II.Mixtures can be separated into their components by taking advantage of differences in the chemical properties of the components. Why might this separation method be less convenient than taking advantage of differences in the physical properties of the components?

Separation by physical properties would be fairly easy compared to separation by the chemical properties. You could use distillation to separate based on boiling point, a molecular seive to separate by size, or a GC column to separate by polarity.

Choose one from the following:
-a chemical property involves a chemical change so that you no longer have what you had.
-The chemical properties of the components of a mixture are too similar to each other.
-Chemical properties are not as apparent as are physical properties.
-The chemical properties of the components of a mixture are too different from each other.

III. Classify the following as element, mixture, or compound
a.table salt - element
b.stainless stell - mixture (actually an alloy)
c.table sugar - compound
d.aluminum - element
e.ice - compound

 

Customer: replied 7 years ago.
Reply to Jennifer's Post:

Here is an additional question that I am having trouble with.
If it's not too much trouble could you please help me with this
one as well?

-Many dry cereals are fortified with iron, which is added to the
cereal in the form of small iron particles. How might these
particles be separated from the cereal?

Choose one from the following.
a. Blend the cereal to a fine consistency and pass through a
filter.
b. Add water and the iron particles will float to the top.
c. Collect the iron filings with a magnet.
d. Heat the cereal so that the iron particles melt and thereby
coallesce.

Expert:  NAL replied 7 years ago.
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Category: Homework
Satisfied Customers: 2201
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