Problem: Choose the pure substance from the list below.A. sea waterB. sugarC. airD. lemonadeE. milk

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We're being asked to choose the pure substance from the list.


Recall that Matter can be categorized as a single or variable composition.

• Matter is considered a pure substance if it is composed of a single entity. Pure substances can be further categorized into two:

Element  cannot be separated into simpler substances or composed of only 1 type of atom (eg. O3, Cl2)
Compound  can be separated into simpler substances

• Matter is considered a mixture if they have variable composition. Mixtures are not chemically combined. Mixtures can be further categorized into two:

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Problem Details

Choose the pure substance from the list below.

A. sea water
B. sugar
C. air
D. lemonade
E. milk

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