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Identify each of the atom which has the following electron configuartions (a) 1s2-2s2-2p6-3s2-3p1 (b) 1s2-2s2-2p6-3s2-3p5 (c) 1s2-2s2-2p6-3s2-3p6-4s2 (d) which of the three has the largest ionization energy Ei1 (e) which of the three has the electron affinity Eea~0
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
A particular element exists in two stable isotopic forms. One isotope has a mass of 34.9689 amu ( 75.77% abundance). The other isotope has a mass of 36.9659 amu. Calculate the average mass of the element and determine its identity.
when ethane c2h6 reacts with chlorine cl2 the main product is c2h5cl but other products containing ci such as c2h4ci2
Combustion of 7.20 g of this compound produced 14.4 g of CO2 and 5.89 g of H2O. What is the emperical Formula of the unknown compound?
Describe Newman projection. Experiments have shown that for 1,2-dichloroethane, ClCH2CH2Cl, in carbon tetrachloride solution at 25C, 70% of the molecules are in the anti and 30% are in the gauche conformation
the following ions contain the same number of electrons. rank them in order of decreasing ionic radii.rank from largest
Calcium reacts with iodine to form an ionic compound. If a sample of the compound contains 8.5 x 1019 iodide ions, how many calcium ions does it contain?
Draw all the isomers you can come up with the formula C10H12O2. Must contain a benzene ring and a double bond. Also, much contain 8 unique carbon types.
The value of ?Ho for the reaction below is -126 kJ. The amount of heat that is released by the reaction of 25.0 g of Na2O2 with water is ________kJ. 2Na2O2 (s) + 2 H2O (l) -> 4NaOH + O2 (g)
How many calories are required to heat 25.0 g of platinum (specific heat capacity = 0.032 cal/g.K) from 24.5 oC to 75.0 oC?
Using Wien's law, calculate the temperature a star must have for the peak wavelength of its blackbody curve to equal this value.
Identify the atom whose electron configuration is [Ne]3s^23p^6. Write the one or two letter symbol for the element. How many unpaired electrons are there in the ground state of this atom?
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