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What is meant by covalency (valence)? explain with example. And oxygen has covalency of 2 while sulphur has covalency up to 6. Why this is so as both belong to the same group?
Define what the compound is and explain why the two different reactions give the same organic product. Remember that organic reactions can be explained as Lewis Acid/Base reactions.
the specific heat of the dilute nacl solution formed during the neutralization of the hcl is about 2 less than the
Iodobenzene(C6H5I, bp 188C) steam distills at 98.2. How many molecules of water are required to carry over 1 molecule of iodobenzene. How many grams os water per gram of iodobenzene
a beam of 632.8 nm photons from a he-ne laser strikes a detector area of 5.0 mm2. the laser has a flux of 3.18 x 1015
A 0.010 M solution of a weak monoprotic acid is 2.5% dissociated at 25* C. What is the equilibrium constant, Ka, for this acid
Explain what are the chemical reactions that take place when you try to crystallize salts formed by mixing (+-)-s-butylamine and (+-)-tartaric acid
The specific heat of toluene, C7H8, is 1.13 J/g K. How many joules of heat are needed to raise the temperature of 50.0 g of toluene from 12.0°C to 30°C?
A 0.894-g sample of gas occupies 125 mL at 60. cm of Hg and 25C. What is the molar mass of the gas.
Wood and oxygen are two reagents required to keep a campfire burning. identify the limiting and excess reagent: a) The fire dwindles over time. b) A carbon dioxide fire extinguisher puts out the flame.
calcium carbonate or limestone is relatively insoluble in water. at 25?c only 5.8 mg will dissolve in 1.0 liter of
Hydrogen gas (H2) and oxygen gas (O2) are the products when an aqueous acidic solution is electrolyzed; each mol of water gives one mol of H2 and half a mol of O2.
Is the lone pair in cycloheptatrienyl anion in sp3 orbital. If so how is it antiaromatic when it does not have an uninterrupted p-orbital
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