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When sugar is burned in oxygen, the content of carbon and hydrogen can be calculated from the generated carbon dioxide and water, and the oxygen element in the two comes from sugar and oxygen, so it cannot be measured.

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tBuLi

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Q: Why decomposition of carbon and hydrogen in sugar cannot be used to determine presence of oxygen in organic compound?
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Why determination of carbon and hydrogen in sugar method cannot be determine the presence of oxygen in an organic compound?

because kCLO3 already contain oxygen. so, it can't be determine which one oxygen came from.


Does pure hydrogen burn?

Yes, Hydrogen burns in the presence of Oxygen to form the compound H2O, better known as water.


Oxygen gas can be formed by using what compound in the presence of manganese dioxide?

Hydrogen peroxide (H2O2)


What indicates the presence of Hydrogen in a compound?

If you place a lit splint into it, the hydrogen will burst and create a squeaky pop. Otherwise, check the reactants you have used.


How does presence of light affect the rate of decomposition?

light will produces heat which will speed up the rate of decomposition.


Thermal decomposition and decomposition temperature-is it refer to the same things?

Thermal decomposition is the process by which chemical bonds are broken in the presence of heat. Decomposition temperature is the temperature at which thermal decomposition occurs, which differs for different compounds.


Why does decomposition need heat?

A decomposition reaction needs the addition of a catalyst or heat to proceed. For instance hydrogen peroxide will break down into water and oxygen gas in the presence of a catalyst; and calcium carbonate will break down into calcium oxide and carbon dioxide gas when heated.


State a test for the presence of hydrogen?

The burning splint test is used to test for the presence of hydrogen. The symbol for hydrogen is H.


Why the lime water cannot be determine the presence of oxygen in an organic compound?

Oxygen has been used up during combustion process of the mixture.


How does the boiling point of a hydrocarbon change in presence of hydrogen?

It can NOT be changed by the presence of hydrogen without chemical reaction.


What kinds of chemical reactions combination combustion or decomposition is the burning of magnesium in oxygen?

When magnesium is burnt in the presence of oxygen, the magnesium and oxygen combine to form the compound magnesium oxide. Therefore, this would be a combination combustion.


What are formed from the decomposition of dioxin in the presence of UV B rays?

The ozone decomposes in the presence of UV-B. It has got large energy.