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A hydrocarbon z with molecular mass 78 on combustion gave 3.384g of carbon (IV) oxide and 0.693g of water. Determine the molecular formula of Z and draw its structure. [H=1, C=12,
What is the advantage of using a flame photometer instrument designed to operate with an internal standard ?
The value of Planck's constant is 6.63x 10 -34 Js. The velocity of light is 3.0x 10 8 ms -1 . Which value is closest to the wavelength in nanometres of a quantum of light with
Calculate the molarmass of a nonelectrolyte that lowers the freezing point of 25.00g of water to -3.9 degrees C when 4.27 g of the substance is dissolved in the water.
what is mole concept
2+2
Distinguish between van''t Hoff Method and Oswald Isolation Method. In each case give an expression for the rate of reaction.
What are the 5 Factors that affects crystallization of organic compounds?
Take these values into account and comment on the relation between the heat of formation of the gases and the vibrational frequencies again.
Oxidation no of fe in fe2o3
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