Classify these materials as pure substance or mixture, then describe their properties.
Milk
Coffee
H2O(water)
Salt
O2(Oxygen)
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Classify these materials as pure substance or mixture, then describe their properties.
Milk
Coffee
H2O(water)
Salt
O2(Oxygen)
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Answer:
Milk - Mixture
Coffee- Mixture
H2O- Pure Substance
Salt - Pure Substance
O2 - Pure Substance
Explanation:
Milk is not a pure substance, it's a mixture. Pure substances are either elements or compounds. Milk is predominately a mixture of water, lactose , etc
Coffee is a mixture in the same way coffee is a mixture of water caffeine and other components of coffee
Water, H2O, is a pure substance, a compound made of hydrogen and oxygen.
Salt. It is considered a pure substance because it has a uniform and definite composition. All samples of sodium chloride are chemically identical.
It's a pure substance, but not necessarily because it only contains oxygen atoms, it's because there's only oxygen molecules present