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Explain when a reactant or product not a solid or pure liquid is added to a chemical system at equilibrium, the system should consume the entire newly-added amount to re-attain equilibrium.
Calculate the theoretical wavelength in nanometers of the light absorbed when an electron in a hydrogen atom makes a electron transition from level n=2 to n=7 (notated as "2==>7").
An aqueous solution contains metal cations Hg^+2 and Mn^+2 belonging to groups 2 and 3 respectively. Thioacetamide which produces H2S is added and the solution is buffered to a pH of 8 by addition of NH3/NH4Cl
A 1.00 L sample of chlorine gas at 1.00 atm and 298 K reacts completely with 1.00 L of nitrogen gas and 2.00 L of oxygen gas at the same temperature and pressure.
Calcium chloride is commonly utilized in first aid "hot packs". The lattice energy of calcium chloride is 2223.4 kj/m. The energy of solution is -2304.7 kJ/mol. Explain how much heat would be generated in a hot pack from the dissolution of 100.0 g..
what are the molecular formula masses of the following substances?express your answer using one decimal
0.0834 moles no are reacted with .0854 moles o2 gas to form no2 gas according to the following equation2nogo2g
compare the relative translational vibrational and rotational contributions to heat capacity for gaseous water and
One form of hemoglobin is 0.345% Fe by mass, and each hemoglobin molecule contains four iron atoms. Calculate the molar mass of this form of hemoglobin.
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q.
when do we use melting point depression method to determine molecular mass vs. other methods such as tiltration and quantitative precipitation
when 2.45 g of an unknown weak acid ha with a molar mass of 85.0g mol is dissolved in 250.0g of water the freezing
Calculate the pH of a buffer solution made by adding 10.0g of anhydrous sodium acetate (NaC2H3O2) to 100 ml of 0.100M acetic acid.
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