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What else can I help you with?
Why is burning of gas considered a chemical change?
All burning reactions involve chemical reactions (chemical changes).
What gaseous substance which is needed by all cells?
Oxygen
Is all physical reactions are reversible?
No, not all physical reactions are reversible. Some physical reactions are irreversible, meaning they cannot easily be undone or reversed to their original state. Examples of irreversible physical reactions include burning a match or breaking a glass.
What is needed for all chemical reactions in a cell?
ENZYMES! its in my text book.
Which of the following forms a new substance melting freezing evaporating burning?
Burning chemically alters a substance, creating different / new substances as a result. Melting, freezing, and evaporating are all different phases of the same substance.
Why do you need heat when burning fuel?
all things need heat for burning without heat u cant just burn anything.as oxygen is needed heat is also needed.
A soft black substance made by burning all organic materials from twigs and sticks?
charcoal = carbon
What is needed for all types of digestion?
Water is required for (nearly) all of hydrolysis reactions (in other words digesstion).
What substance is common to all combustion reactions?
Oxygen gas, O2, is present in all combustion reactions. Example: Combusting methane gas CH4(g)+2O2(g) ----> CO2(g) + 2H2O(g)
What are the three different one-word names given to the chemical reactions in which fuels react with oxygen?
corrosion is one, oxygen and accetelyne are all oxidation reactions of chemiacals
Why is chemical energy needed in all chemical reactions?
To initiate a chemical reaction an activation energy is necessary.
When burning a candle is there fission?
No. Burning a candle is a combustion reaction. As with all chemical reactions the energy released comes from the rearrangement of the electron clouds that form chemical bonds. The nuclei of the atoms remain unchanged.
