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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?
The unit celll of copper (Cu) is a face-centered cube that has an edge lenth of 3.62 A (note: 1A=1*10^-10 m). Determine the volume occupied by one mole of copper atoms, interms of mL/mol.
Consider the following equalibrium: 4NH3(g) + 3O2(g) 2N2(g) + 6H2O(g). Suppose 0.30 mol of NH3 and 0.40 mol of oxygen are added to a 5.0-l container. If x mol of water is present at equalibrium, how many moles of ammonia will remain at equalibri..
The compound K3C60 is a superconductor at low temperatures. In this compound the K+ ions lie in the holes in the C60- face-centered cubic lattice.
Compounds in a and b were named incorrectly. On a sheet of paper draw the molecule that fits the given description. From the structure you drew determine the correct IUPAC name. Write the correct IUPAC name in the blank.
Which metal requires higher frequency light to produce photoelectrons. Calculate the minimum frequency that will produce photoelectrons from each surface.
Hexachlorophene is used as a disinfectant in germicidal soaps. What mass of hexachlorophene (molar mass = 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C?
The mixture had an observed specific rotation of 15.9°. If it is known that the specific rotation of the R enantiomer is -32.5°, determine the percentage of each isomer in the mixture.
Chemistry The neutralization reaction between aqueous potassium hydroxide and aqueous acetic acid would be written as which of the following?
A sample of gasoline was run through the GC yielding several peaks indicating the components that made up the gasoline mixture. Uncertain of the amount of benzene in the gas, a pair of students taking instrumental analysis does an experiment using..
Draw the product(s) of the reaction of 3-dimethylcyclopentene with meta-chloroperoxybenzoic acid.
a.) Available Electrons (AE) b.) Needed Electrons (NE) c.) Geometry Description d.) Number of sigma bonds e.) bonding description f.) lewis dot structure
consider the titration of 39.0 mL of 0.240 M HF with 0.215M NaOH. Calculate the ph at the following points. calculate the ph after the addition of 9.75 mL of base.
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