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in Chemistry
Answer: Avogadro\'s number is 6.022 x 10^23, representing the number of particles in one mole.
Answer: Aluminium is extracted from molten alumina by electrolysis in the Hall-Heroult process.
Answer: Dividing all subscripts in C6H12O6 by the greatest common divisor 6 gives CH2O.
Answer: Carbon has atomic number 6, meaning it has 6 protons in its nucleus.
Answer: The Pascal (Pa) is the SI unit of pressure, equal to one newton per square meter.
Answer: But-2-ene exhibits cis-trans isomerism because each carbon of the double bond has different substituents.
Answer: The law of conservation of mass states that total mass remains constant during a chemical reaction.
Answer: Fluorine is the most electronegative element on the Pauling scale with a value of 3.98.
Answer: In propan-1-ol the hydroxyl group is attached to a carbon bonded to only one other carbon atom.
Answer: Carbon in methane forms four equivalent sigma bonds using sp3 hybridization.
Answer: Al2O3 reacts with both acids and bases, which is the defining property of an amphoteric oxide.
Answer: NaCl is formed by the transfer of an electron from Na to Cl, creating an ionic bond.
Answer: Complete combustion of any hydrocarbon in excess oxygen always yields CO2 and H2O.
Answer: Dissolving ammonium nitrate in water absorbs heat from surroundings, making it endothermic.
Answer: Litmus paper turns red in acidic solutions due to the presence of excess H+ ions.
Answer: A neutron is a neutral subatomic particle found in the nucleus with no electric charge.
Answer: Zinc displaces hydrogen from HCl, producing zinc chloride and hydrogen gas.
Answer: Starch is a polysaccharide composed of long chains of glucose units linked by glycosidic bonds.
Answer: Aldehydes contain the -CHO (formyl) functional group bonded to at least one hydrogen.
Answer: Nitrous oxide (N2O) is called laughing gas because it produces euphoria when inhaled.