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no 70 percent of all oxygen comes from algee and 100 percent of plants are decendant of algee

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What would happen if there was no hydrogen and oxygen in water?

Water is a compound made up of two hydrogen atoms and one oxygen atom bonded together. If there were no hydrogen and oxygen in water, it would not exist as a substance. The properties and characteristics of water, such as its liquid state, transparency, and ability to dissolve other substances, depend on the presence of hydrogen and oxygen.


Could life as we know it survive with only oxygen?

I think, no. We need oxygen and hydrogen to make water so with only oxygen and no hydrogen we would have no water and life as we know it cannot exist without water


What are the chemistry symbols for oxygen and water?

The atomic symbol for oxygen is O. The chemistry symbol for water is H2O. Water covers about 70 percent of our planet & is needed to support life. Without it, we would not exist.


What metals dont react with acid oxygen or water?

A metal that does not react to acid, oxygen or water does not exist.


Hydrogen and Oxygen present in a 1 to 2 to 1 ratio is what?

Hydrogen and oxygen present in a 1:2:1 ratio is characteristic of water (H2O). This ratio reflects the stoichiometry of water where each water molecule contains two hydrogen atoms for every one oxygen atom.


What would happen to global temperatures if water was present in large amounts in the thermosphere or exosphere?

If water were present in large amounts in the thermosphere or exosphere, it would likely have a minimal effect on global temperatures. These layers of the atmosphere are extremely thin, and any water present would exist in the form of vapor due to the high temperatures. The overall impact on climate would be negligible.


Why is oxygen in the water molecules?

Water is made of two hydrogen atoms and an oxygen atom. The combination of hydrogen and oxygen is needed in order to create a molecule with the properties characteristic of water. Water cannot exist without oxygen.


Reason why life can exist on earth?

because there an oxygen, water, and food


Most of the oxygen and hydrogen in living organisms is present as?

water


What need to be present for bread to turn mouldy?

oxygen and water


When hydrogen and oxygen are mixed they form water then why exist in gaseous form?

very high temperature is needed to combine hydrogen and oxygen. at that temperature, water exists in gaseous form Oxygen exists as a gas in our atmosphere, because there isn't very much hydrogen in the atmosphere. If the Earth's atmosphere contained a substantial amount of hydrogen mixed with the oxygen, it would be an explosive mixture. Any spark would set it off. They the oxygen and hydrogen would combine to form water, and we would be left without enough oxygen to breathe.


Life depends upon?

Life depends upon there being a supply of oxygen, water and food. Without these, life would cease to exist.