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Calculate the molar mass of a gas that has a density of 0.605 g/L at 229 degrees Celsius and 499 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
Use the Frost Circle to draw the energy levels of the Pi molecular orbitals for this ion, show the electronic configuration and explain why the ion is aromatic.
The heat capacity of the gas, at constant pressure, is 20.8 J/molK. What is the total energy change delta U (in J) for the gas
A molecule of unknown structure has a molecular formula of C9H8O2. In the infrared spectrum there are absorptions at 1761, 1145, and 761 cm-1. In the 13C NMR spectrum,
Use the Variational Principle a to estimate the ground state energy of a harmonic oscillator with un-normalized trial wavefunction φ(x)=1/(1+βx2)2 where β is a paramete
What are the [H3O+] and the pH of a propanoate buffer that consists of 0.48 M CH3CH2COONa and 0.34 M CH3CH2COOH? Ka of propanoic acid = 1.3 multiplied by 10-5.
When a 41.7g sample of an unknown compound is dissolved in 500g of benzene, the freezing point of the resulting solution is 3.77oC. The freezing point of pure benzene is 5.48oC, and Kf for benzene is 5.12oC/m. Calculate the molar mass of the unkno..
The initial temperature is 298k. The diameter of the cylinder is 0.5m. and the piston height is 1m. a. what is the mass of the weights on the cylinder
When naming cis/trans isomers, when will i have cis,cis or trans,trans, or cis/trans.-more than one cis and trans.
Consider the unbalanced equation above. A sample of impure mercury(II) oxide is heated and the HgO decomposed completely. If 580. mL of O2 is collected by displacement of water at a barometric pressure of 790.0 mm Hg and 25.0°C,
flask a 25 ml 8 oh- ions and 4 ca 2 ionsflask b 25 ml 6 h ions and 6 cl- ionsa if each sphere represents 1.0 x 10-3 mol
calculate the empirical formula of hydrated ferrous ammonium sulfate feanh4bso4ch2od from the following data.a. 0.7840
a positive ion ESI mass spectrum of a protein showed a peak at m/z = 1001 resulting from the adition of 10 protons. what is the actual mass of the uncharged protein?
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