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How is oxygen produced commercially?
Various methods have been used for the large scale production of oxygen, but at present the two mostly used are the electrolysis of an aqueous solution of dilute sulphuric acid, and the fractional distillation of Liquid Air.
Is liquid oxygen same as regular oxygen?
Liquid oxygen is oxygen that has been cooled to extremely low temperatures so that it condenses.
Is oxygen manmade?
No. Earth's oxygen is provided by plants. Humans need oxygen to live, so we could not have been there before there was oxygen, so we could not have made the oxygen.
When a candle is put under a tumbler why its flame goes after some times?
When a candle is put under a tumbler , the flame goes after somtimes . This is all because all the oxygen present in the tumbler has been used for burning.
Was the atmosphere of the earth always mostly nitrogen and oxygen?
No, the Nitrogen in the air has probably always been there (because nitrogen is rather inert), but originally Earths atmosphere was reducing (it had no free Oxygen) and probably contained large amounts of CO2 and hydrocarbons. The present atmosphere on Earth is the product of biological processes which have slowly introduced free Oxygen into the Oceans and then the atmosphere - life made Earth habitable for life!
How long has oxygen been fully present in the atmosphere?
500 million years
Did the primitive Earth have oxygen?
No. Oxygen is not believed to have been present in the early years of Earth's history.
Where was the Titanic's captain?
Captain Smith had been resting, but not retired because witnesses say that after the collision he was present almost right away and fully dressed.Captain Smith had been resting, but not retired because witnesses say that after the collision he was present almost right away and fully dressed.
How much oxygen was there 2.2 billion years ago?
There was so much oxygen 2.2 billion years ago such that it cannot be computed. In the present day, most of the oxygen has been reduced to metal oxides.
What happen if there is no oxygen from the beginning?
There was no free oxygen when the earth began and when life began on the earth. Eventually single organisms developed in the oceans that released oxygen as part of their metabolic activity. After millions of years, enough free oxygen was present in the oceans and in the atmosphere to support the development of life that depended on oxygen.If there had never been any oxygen at all in the universe, the development of the planet earth would have been very different, since there would have been no oxygen to combine with hydrogen to form water, and life as we know it would never had developed.
How was your atmosphere and ozone created?
Oxygen is carried in the solar wind, but mostly oxygen is produced by surface plant life. Nitrogen was expected to have been part of the initial ancient atmosphere, and is non-reactive (and heavy) enough that it is still present. Ozone is made from oxygen and sunlight.
How is oxygen produced commercially?
Various methods have been used for the large scale production of oxygen, but at present the two mostly used are the electrolysis of an aqueous solution of dilute sulphuric acid, and the fractional distillation of Liquid Air.
Is have been a present participle?
No, "have been" is not a present participle. It is the present perfect tense of be. Being is the present participle of be.
How did Earth change about 2.5 billion years ago when many organisms began using photosynthesis to make food?
The amount of oxygen in the atmosphere increased.Until then carbon dioxide had been present in huge quantities in the atmosphere, while oxygen would have been extremely rare. Photosynthesis uses up carbon dioxide and releases oxygen so the proportion of oxygen would have increased dramatically, paving the way for oxygen-breathing life-forms.
What is the present perfect tense of am?
The present perfect tense of "am" is "have been" or "has been," depending on the subject. For example: "I have been" or "She has been."
What is the present perfect tense for am?
The present perfect tense for "am" is "have been."
What are the verbs which are used with present participles?
Verbs typically used with present participles include "be," "keep," "enjoy," "avoid," "resist," "continue," "consider," "finish," "begin," "start," and "forget." These verbs are used to show simultaneous or ongoing actions, states, or habits.
