Answers

2014-07-24T17:05:56+08:00
The example of substances are,tin,sulfur,diamond,water,pure sugar(sucrose) and table salt(sodium chloride).

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2014-07-24T17:06:57+08:00
helium (He) 
water (H2O)
iron (Fe)
hydrochloric acid (HCl)
carbon dioxide (CO2)
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