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fenix001 [56]
3 years ago
12

Os supports combustion a chemical or physical property

Chemistry
1 answer:
Olegator [25]3 years ago
7 0
Anything which changes the composition of starting material is a chemical property or chemical change. For example: you bake cake or cook food the heat changes composition of these. So cooking is a chemical change.

But evaporation of water is a physical change because even after evaporating it is still water molecules not changed to something else.

Combustion of any substance is burning of any substance in air. Combustion is actually the burning of a substance with oxygen in air. So, when a substance undergoes combustion it changes in it’s composition.

COMBUSTION IS A CHEMICAL CHANGE

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Maksim231197 [3]

Answer:

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3 years ago
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If the atmospheric pressure is 0.975 atm what is the pressure of the enclosed gas
Nuetrik [128]
Missing in your question:
Picture (1)
when its an open- tube manometer and the h = 52 cm. 
when the pressure of the atmosphere is equal the pressure of the gas plus the pressure from the mercury column 52 Cm so, we can get the pressure of the gas from this formula:
P(atm) = P(gas) + height (Hg)
∴P(gas) = P(atm) - height (Hg)
              = 0.975 - (520/760) 
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Note: I have divided 520 mm Hg by 760 to convert it to atm
Picture (2)
The pressure of the gas is the pressure experts by the column of mercury and when we have the Height (Hg)= 67mm 
So the pressure of the gas =P(atm) + Height (Hg)
                                             =  0.975 + (67/ 760) = 1.06 atm
Picture (3) 
As the tube is closed SO here the pressure of the gas is equal the height of the mercury column, and when we have the height (Hg) = 103 mm. so, we can get the P(gas) from this formula:
P(gas) = Height(Hg)
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6 0
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Why are digestive enzymes in a cell enclosed in a membrane
erastova [34]
The membrane<span> keeps the </span>digestive <span>materials from leaking out into the cytoplasm and destroying the </span>cell<span>.
</span><span>
</span>
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If element selenium would react to form and ion, what would its most like charge be, based on its location within periodic table
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Explanation:

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Water has a “bent” geometry. Which explanation does not explain why?
pogonyaev
What are the answer choices ?
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3 years ago
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