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The answer looks long and confusing but the thing is, it really isn't Here is a simple experiment that shows that the atmosphere today contains around 'one fifth oxygen.'
1) When it's heated, copper reacts with oxygen in the air to make copper oxide - so the reaction uses up oxygen.
2) if you heat an excess of copper in a tube and pass air over it using two syringes, you can use the markers on the syringes to tell how much oxygen has been used up.
3) So, if you start with 100cm of air, you'll end up with around 80cm when the reaction's finished and the air has cooled. If 20cm of air has gone then around 20% of the air must be oxygen.
Get it? Try reading again and you might understand :D
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∙ 11y ago
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What proportion of each gas in air?
The percentage of oxygen in air is 21%.
What would have to the oxygen content in the air if photosynthesis were stop?
The oxygen content in air would have decreased. This is because photosynthesis is a process which keeps the balance between oxygen and carbon dioxide by converting carbon dioxide to oxygen.
Where does oxygen come from when burning wood?
From the atmosphere (air) surrounding the wood. The wood would not burn in a vacuum devoid of air. Air is composed of approximately 20% oxygen.
Does ocean water have higher levels of oxygen than air?
I would say the air has the highest level of oxygen but it depends how high up you are.
How would you go about storing the extra oxygen and air that would continuously provide fresh air to the astronauts?
having air pockets in the resperater of the astronuat's suit
What natural hazard would be more common and more dangerous if the proportion of oxygen in the air was very much greater than it is today?
Fire.
What danger we have to face if the proportion of oxygen and nitrogen in the air undergo a change?
Difficult respiration if the oxygen is under 20 % followed by death.
What is the difference between the air we breathe in and the air we breathe out?
The difference - is in the proportion of the gasses present. The air we breathe in contains about 20% Oxygen. What we breathe out has about 16% oxygen and high levels of carbon dioxide.
Why is it inaccurate to say that you breathe in oxygen and breath out carbon dioxide?
Because what you breath in is air (which is 80% nitrogen) not oxygen and what you breath out is air with a slightly changed proportion of gases as compared that which you breathed in.
What proportion of the air is made up of carbon dioxide oxygen and nitrogen?
nitrogen is 78% while CO2 is part of a percent
Does gallium react with oxygen?
of course not gallium does not react with oxygen you retards cuz if it did then something would happen if you would it in the air cuz oxygen is in the air
What proportion of each gas in air?
The percentage of oxygen in air is 21%.
Does air conditioning lower oxygen levels?
Air conditionning has no chemical reactions that would lower oxygen levels. It does however reduce the humidity in the conditionned air. This would remove moles of water from the air and increase the perecntage, but not the mass, of the oxygen in an air sample.
What would happen if much carbon dioxide in the air is not used by plants in food making?
When there is too much carbon dioxide collecting in the air and the plants do not use it up, it may grow to toxic proportions. The content of oxygen will reduce in proportion to the amount of carbon dioxide.
What would have to the oxygen content in the air if photosynthesis were stop?
The oxygen content in air would have decreased. This is because photosynthesis is a process which keeps the balance between oxygen and carbon dioxide by converting carbon dioxide to oxygen.
How can you prove that oxygen is in the air?
Well, Oxygen is in the air. You can prove that it is because we would all be dead. We breathe Oxygen. Answer - You can prove that Oxygen is in the air because without it we would die, and if you didn't already know, we are breathing it right now. Hoped This Helps :/ -Sara-
Where YOU would find oxygen gas?
in the air
