How does a fire extinguisher works ?
1 answer:
Answer:
<em>Most fire extinguishers work by separating the fuel from the oxygen. The oxygen comes from the air. It is the same oxygen we breathe. Since the oxygen has to be in contact with the fuel, if you can coat the fuel with something that keeps the oxygen away, the fire will go </em><em>out.</em><em> </em><em>S</em><em>ome </em><em>ways </em><em>of </em><em>using </em><em>fire </em><em>extinguisher </em><em>are:</em>
- <em> Water extinguishers work mainly by cooling (removing heat), but a dense spray of water droplets also helps to cut off oxygen. </em>
- <em> Dry powder extinguishers soak up heat, melt on the fuel, and cut off oxygen, but they also neutralize the </em><em>fuel</em><em> (cutting it off from the </em><em>fire)</em><em> </em><em>.</em>
Explanation:
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Answer:
56.0 g
Explanation:
Calculation of the moles of as:-
Mass = 85.0 g
Molar mass of = 162.2 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the reaction:-
1 mole of on reaction forms 1 mole of
Also,
0.52404 mole of on reaction forms 0.52404 mole of
Moles of = 0.52404 moles
Molar mass of = 106.867 g/mol
Mass = Moles*Molar mass = = 56.0 g
Consideing the definition of velocity, the total velocity is 43.75 miles/h.
<h3>Definition of velocity</h3>Velocity is a physical magnitude that relates the displacement of an object, the time it takes to make this change in position and direction.
The velocity can be defined as the amount of space traveled per unit of time with which a body moves, considering the direction, and can be calculated using the expression:
velocity= distance traveled÷ time
Velocity has units of .
In this case, you know:
- distance traveled= 350 miles
- time= 8 h
Replacing in the definition of velocity:
velocity= 350 miles÷ 8 h
Solving:
<u><em>velocity= 43.75 miles/h</em></u>
Finally, the total velocity is 43.75 miles/h.
Learn more about velocity:
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