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oloom 6ebtday 2020-2021 20*28oloom 6ebtday 2020-2021 20*28 Author: negm Created Date: 6/16/2020 1:14:10 PM
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Oxygen gas helpsin burning.
we can conclude that : Air consist of oxygen gas which helps in
burning.
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The molecule of water consists of an oxygen atom combined with
two at-oms of hydrogen.
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Carbon dioxide is emitted as a resulte of the respiration of
living organisms and the combustion of organic materials such as
:
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More of Knowledge
The importance and uses of nitrogen :
- Nitrogen is recently used in filling car tires for the
relative
constancy of its volume at the change of temperature. (Figure
26)
- Small amounts of nitrogen are used to fill some types of
lamps.
- Nitrogen is used to make stainless steel.
- lt takes part in the composing of gunpowder and ammonium
nitrates included in the composition of soil fertilizert.
- lt is commercially used in the manufacture of ammonia to
produce
fertilizers (Figure 3- 27).
Fig (3- 27) Nitrogen is used
in filling tires
Fig (3- 28) Fertilizers
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Choose the right answer :
a- Nitrogen gas precentage is ....... of the air.
1- 21% 2- 78% 3- 12% 4- 1%
b- Nitrogen is the most important part of ........
1- protenis 2- Corbohydrates.
3- fats. 4- water
c- From the properties of nitrogen is .......
1- it burns.
2- enter the structure of corbohydrates.
3- enter the process of breathing.
4- Not help in burning
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We will study the skeletal system only.
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![Negm Eddin - COUNCIL OF WAR [SEQNENRE – KAMOSE – THUTMOSE III]](https://img.dokumen.tips/doc/110x75/5459e621af79594f558b58cf/negm-eddin-council-of-war-seqnenre-kamose-thutmose-iii.jpg)
