an ear or a ear

THE ANSWER IS AN EAR BECAUSE E IS A VOWEL

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Water is a compound made up of hydrogen and oxygen, so pure water would be water that contains nothing but hydrogen and oxygen. However, pure water of this sort does not normally exist except in the controlled environment of a laboratory. Even in a laboratory pure water is hard to come by.If you want to know if your home's drinking water contains unsafe levels of lead, have your water tested. Testing is the only way to confirm if lead is present or absent. Some faucet and pitcher filters can remove lead from drinking water.A physical test for pure water is testing the boiling or freezing point. Pure water will boil at 100 degrees Celsius and freeze at 0 degrees Celsius. One chemical test is to use cobalt chloride paper - the paper will turn from blue to pink in the presence of water.There are some basic water tests that don't have anything to do with chemical testing: conductivity, odor, sediment, and turbidityAlthough its formula (H2O) seems simple, water exhibits very complex chemical and physical properties. For example, its melting point, 0 ?C (32 ?F), and boiling point, 100 ?C (212 ?F), are much higher than would be expected by comparison with analogous compounds, such as hydrogen sulfide and ammonia.Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it. When water is present in a sample of copper(II) sulfate it turns blue.Although its formula (H2O) seems simple, water exhibits very complex chemical and physical properties. For example, its melting point, 0 ?C (32 ?F), and boiling point, 100 ?C (212 ?F), are much higher than would be expected by comparison with analogous compounds, such as hydrogen sulfide and ammonia.Although its formula (H2O) seems simple, water exhibits very complex chemical and physical properties. For example, its melting point, 0 ?C (32 ?F), and boiling point, 100 ?C (212 ?F), are much higher than would be expected by comparison with analogous compounds, such as hydrogen sulfide and ammonia.Although its formula (H2O) seems simple, water exhibits very complex chemical and physical properties. For example, its melting point, 0 ?C (32 ?F), and boiling point, 100 ?C (212 ?F), are much higher than would be expected by comparison with analogous compounds, such as hydrogen sulfide and ammonia.