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Examples of pure substance: gold, silver, carbon dioxide, hydrogen
Ethanol contains the elements carbon, hydrogen, and oxygen.
Yes, all is true.
Water's composition is H2O (two hydrogen atoms and an oxygen atom), while alcohol has molecules that are bound to carbon (e.g. ethanol is C2H6O, or two carbon, six hydrogen, and one oxygen atom), which would be an impurity if found in pure water. Therefore, no alcohol is present in pure water.
Glycerine is a pure organic compound it is a trihydric alcohol so contains carbon, hydrogen and oxygen atoms.
Carbon and Hydrogen are both pure substances. They only contain Carbon and Hydrogen atoms respectively. Inside these atoms are protons, neutrons and electrons.
Elements.
Examples of pure substance: gold, silver, carbon dioxide, hydrogen
No. Methane (natural gas) is one carbon atom bonded to four hydrogen atoms. Pure carbon is called graphite, or if in its crystalline form, diamond.
Pure ethanol contains carbon, hydrogen, and oxygen.
The elements are carbon and hydrogen, C and H. they're linked by single bonds.
Yes, all is true.
Traces of oxygen and carbon monoxide.
No. It is a compound of four elements: sodium, carbon, hydrogen, and oxygen.
Ethanol contains the elements carbon, hydrogen, and oxygen.
All substances are MADE FROM elements but they are not elements. For example CH4 is made of one carbon atom and four Hydrogen atoms. Carbon and Hydrogen are pure elements but CH4 is not an element.
Yes, all is true.