What is the heaviest element in the universe?
uranium
What is the symbol of oxygen?
O
How does oxygen occur in nature?
Hint: Atmosphere consists of around 20% of oxygen. This is maintained by oxygen cycle. The oxygen from the atmosphere is used up by living organisms and then returned to the atmosphere again.
What process uses oxygen?
photosynthesis
Can oxygen be made?
Oxygen can be produced from a number of materials, using several different methods. The most common natural method is photo-synthesis, in which plants use sunlight convert carbon dioxide in the air into oxygen. This method is called electrolysis and produces very pure hydrogen and oxygen.
What is the Valency of oxygen?
2
What is chemical formula of water?
H2O
Can 100 oxygen explode?
It is very reactive. Pure oxygen, at high pressure, such as from a cylinder, can react violently with common materials such as oil and grease. Other materials may catch fire spontaneously.
Can you breathe in pure oxygen?
Pure oxygen can be deadly. Our blood has evolved to capture the oxygen we breathe in and bind it safely to the transport molecule called haemoglobin. If you breathe air with a much higher than normal O2 concentration, the oxygen in the lungs overwhelms the blood’s ability to carry it away.
Is oxygen a fuel for fire?
It is composed of three elements – fuel, heat and oxygen – which must all be present for a fire to ignite.
Will fire continue in the absence of oxygen?
Without sufficient oxygen, a fire cannot begin, and it cannot continue. With a decreased oxygen concentration, the combustion process slows. Oxygen can be denied to a fire using a carbon dioxide fire extinguisher, a fire blanket or water.
Why is oxygen needed for fire?
Oxygen supports the chemical processes that occur during fire. When fuel burns, it reacts with oxygen from the surrounding air, releasing heat and generating combustion products (gases, smoke, embers, etc.). This process is known as oxidation.
How much oxygen is required for combustion?
Therefore the quantity of oxygen required for combustion of 1 kg of the fuel is: (2.66C + 8H + S) kg. ∴ Oxygen required from air for the complete combustion of fuel will be (2.66C + 8H + S – O) which can be written as 2.66C + 8 (H – O/8) + S, the term in the bracket being known as the available hydrogen.
How much oxygen is needed for complete combustion of ethane?
When elements are burned, the combustion reaction gives their most common oxides as the primary products. Thus, it can be seen that 7 molecules of oxygen are required for the complete combustion of 2 molecules of ethane. Hence, 72 molecules of oxygen are required for the complete combustion of 1 molecule of ethane.
What are three types of combustion?
Here’s a closer look at five types of combustion:
- Complete Combustion. Complete combustion requires a combination of fuel and oxygen.
- Incomplete Combustion. Incomplete combustion occurs when there is not enough oxygen for the fuel to fully react.
- Rapid Combustion.
- Spontaneous Combustion.
- Explosive Combustion.
What volume of oxygen is required for the complete combustion of ethane?
Answer: 1 litre of ethane requires = 3.5 litres of oxygen for combustion. 4 litres of ethane will require = 3.5×4=14 litres of oxygen. Hence, 4 litres of ethane requires 14 litres of oxygen for combustion.
What volume of oxygen is required for the complete combustion of 5cm3 of C2H2?
C2H2 + 5/2O2————-2CO2 + H2O. 1 Mole of acetylene requires 2.5 moles of oxygen for complete combustion. At NTP , 22.4 Litres of acetylene requires= 2.5 x 22.4 Litres of oxygen.
What volume of oxygen would be required?
1000 ml of oxygen is required and 800 ml of carbon dioxide is formed. Explanation: The volume of oxygen required to burn completely 400 ml of acetylene and the volume of carbon dioxide formed. Hence 1000 ml of oxygen is required and 800 ml of carbon dioxide is formed.
What volume of oxygen would be required for the complete combustion of 100 Litres of ethane?
2 vol of ethane reacts with 7 vol of oxygen. So, 100 litres of ethane will require 100×3.
What happens when oxygen reacts with ethane?
Ethane, C_2H_6, reacts with molecular oxygen to produce carbon dioxide and water.
What is the volume of ethane?
37.51L