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Q. Determine the specific heat and claculate the total heat transfer?
Ans. If a mug full of coffee has about 350 g of liquid inside, how much heat is lost as it cools from 87oC to 25oC? Assume that coffee is made completely of water, which has a specific heat of 4.18 J/goC.
rounding to 2 significant digits we have
So about 91 kJ of heat were lost as the coffee cooled down.
Principle of atomic fluorescence spectrometry: In AFS, the analyte is converted within gaseous atoms in the ground state using a appropriate atomization technique. These are t
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effect on human body.
Q. Show the properties of Tetrahydrido borate? Tetrahydrido borate anion BH - 4 has a tetrahedral structure which can be explained on the basis of sp 3 hybridisation of boron
Penta valent element has one electron more than 4 electrons which could be used for conduction while the trivalent elements has 1 electron less , this can also be seen as a hole
functional groups of organic compounds
A gas contains 350 ppm of H 2 S in CO 2 at 72°F and 1.53 atm pressure. If the gas is liquified, what is the weight fraction H 2 S? You are asked to make up a laboratory soluti
Q. Show General Characteristics of group16? The valence shell electronic configuration of Group 16 elements is ns 2 , ns 4 . These elements tend to gain inert gas configuration
what is oxidation state?
Q. Show the chemical properties of Aluminium? Aluminium has a very high affinity for oxygen; this is reflected in high exothermic heat of formation of Al 2 0 3 (-1676 kJ mol -
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