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a nitrogen molecule travel at about 505 m/s at room temperature. find the velocity of a helium atom at the same temperature
isomophosis
Classification of polymers - Natural polymer The polymers acquired from nature (plants and animals) are known as natural polymers. These types of polymers are extremely essenti
The most important classification of elements is that of non-metallic versus metallic. Metallic elements form solids that are good conductors of electricity, and where bonding is n
An air oven A large tin can is used as an air oven. A hole through the lid fitted with a cork holds a thermo- meter, and the saucer or dish rests on a wire gauze bridge placed
Neutrons are found in atoms of all elements except in: (1) Chlorine (2) Oxygen (3) Argon (4)Hydrogen Ans: Hydrogen
advantages and dis advantages
The valency of sulphur in sulphuric acid is: (1) 2 (2) 4 (3) 6 (4) 8 Ans: 6
An aqueous solution has a hydroxyl concentration of 1.75 x 10^-7mol/L. Find the concentration of hydrogen ions in this solution.
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