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a) Explain while carbon is bonded to 4 hydrogen atoms to form CH4, the 2s and the three 2p orbitals undergo hybridization to form four sp3 orbitals.
b) By hybridization of the carbon atom, a total of four lone electron orbital sites are established. These sites are described p4 orbitals.
c) Making four bonds lowers the potential energy for the system.
d) The pragmatic geometry for the methane molecule is tetrahedral. Each bond angle is exactly 109.5°.
Calculate the molality of a 0.052 M solution of ethyl alcohol in water at 25 degree Celsius. (assume the density of the solution at such low concentration is equal to that of water at 25 degree Celsius,0.997 g/mL.)
A 1.00 g sample of an unknown gas occupies 418 mL at 23.0 oC and 715 torr. Calculate the density at 23.0 oC and the molar mass of the gas.
What mass of H2 forms if 12 grams of Zn reacts with 7 grams of HCl?
What is the pressure (in mmHg) of the gas inside the apparatus below if the atmospheric pressure is Patm=775 mmHg, h1=20 mmHg, and h2=50 mmHg
A 1.00L Solution contains 3.50x10^-4 M Cu(NO3)2 and 2.20x10^-3M ethylenediamine(en). The kf for Cu(en)2^2+ is 1x10^20. What is the concentration of Cu2+(aq) in the solution
Determine end value of n in a hydrogen atom if the electron starts in n=4 and atom emits wavelength of 486nm.
Select each side of the mass balance equation for an Fe3(PO4)2 solution where the existing species are Fe2 , PO43-, HPO42-, H2PO4-, H3PO4, FeOH?
The molecule C3H6F2 can exixt in three isomeric forms.(the three carbons are central atoms ,and the H and F atoms are bonded to the carbons.) Write the lewis formulas of the trhee isomers, predict their VSEPR geometries and sketch their molecular ..
if 41.2 g of water at 18.7C are mixed with 27.6 g of water at 38.4 C what will be the temperature of the mixture. (Assume that no thermal energy is lost to the surroundings)
What is the final temperature in a squeezed cold pack that contains 40.0 g of NH4NO3 dissolved in 135 mL of water? Assume a specific heat of 4.18 J/(g·°C) for the solution, an initial temperature of 25.0°C, and no heat transfer between the cold pa..
If a 10.00mL sample of unknown concentration of HF is titrated with 28.94mL of 0.1040M NaOH
A gas measures 10ml at 27degree celcius and 750mm of mercury what will be the mole of gas at 15degree celcius and 750mm of mercury
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