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Draw out the Lewis structures for H2CO3, HCO3-, and CO32-. Then determine the maximum number of equivalent resonance structures for each species. Note that carbon is the central atom in all three cases. If the molecule contains hydrogen atoms they are attached to oxygen atoms. Only count the best structures. For example, A structure with really bad formal charges should not be counted.
The molecule H2CO3 has __ equivalent Lewis structures.
The molecule HCO3- has __ equivalent Lewis structures.
The molecule CO32- has ___ equivalent Lewis structures.
The chlorofluorocarbon CCl2F2 was once used in air conditioners as the heat transfer fluid. Its normal boiling point is 30 °C, and its enthalpy of vaporization is 165 J g-1
A 5.00 L volume of ethane gas is heated from 298 K to 596 K. If the pressure remains constant, what is the final volume?
The Balmer series of transitions for the hydrogen atom result in absorption of photons that all originate from the n = 2 level. What are the longest and shortest wavelength photons in the Balmer sequence?
The relative electrophoretic mobilities of a 30-kd protein and a 92-kd protein used as standars on an SDS polyacrylamide gel are 0.80 and 0.41, respectively.
which is limiting reagent when 42.0g of propane , C3H8, is burned with 115g of oxygen ? how many liters gaseous water are produced at STP
What is the maximum kinetic energy of a photoelectron ejected fromcesium by 555 nm light? Note that if the wavelength of light usedto irradiate the cesium surface becomes longer than 660 nm
Calculate the work done on a 2500. kg car in accelerating it from rest to a speed of 100. km/hr.
Calculate the number or calories of heat energy required for warming 34.6g of water from 18.9 celsius to 29.9 celsius
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 rm J/(g cdot {^circ C}) and 1.00 rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.
The equation for the combustion of acetone is: 2 C3H6O + 8 O2 ---> 6 H2O + 6 CO2 + 852.6 kcal How much heat will be given off if 0.18 mol of acetone is completely burned?
titrate the first HA solution with 87.4 mL of 0.0906 M NaOH and the mixture of HA and HB in the second flask with 94.0 mL of the NaOH solution. Calculate the molarity of the HA and HB solutions.
A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi. The elastic moduli of the concrete and steel are, respectively,
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