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most scientists agree that the earth is 4.5 billion years old. 50 years from noe, how many sig figs will we record in the age of the earth
Based on the Ksp values of CuS, PbS, MnS and HgS, which the the following ion pair will be the easiest to separete by fractional precipitation
NaOH (aq) are required to neutralize 25.0 mL of HCl (aq). Calculate the concentration of the hydrochloric acid solution.
A mixture of ammonium chloride and sand is placed in an evaporating dish and massed at 56.246g. The mixture is heated, driving off the ammonium chloride and massed again
A student standardizes his NaOH titrant solution with KHP. He performs three titrations - in each trial, the mass of KHP (204.22 g/mol) used is 1.500 g. The average amount of NaOH used in the standardization is 29.3 mL +/- 0.06 mL.
A 20.0 mg sampele of a pesticide with a molecular mass = 385.91 was dissolved in a 5 mL volumetric flask. a 2.00 mL aliquot was withdrawn & placed in a 25 mL volumetric flask, and diluted to the mark.
It takes 48.0J to raise the temperature of an 9.60g piece of unknown metal from 13.0c to 24.0. What is the specific heat for the metal? Express your answer numerically, in J/g.C
15.0 moles of gas are in a 8.00 L tank at 21.0C. Calculate the difference in pressure between methane and an ideal gas under these conditions
Could you separate it from benzoic acid using extraction procedures? If so, please detail and explain how this can be done.
Determine the value of the equilibrium constant at this temperature - Ammonium Hydrosulfide NH4HS yields NH3(Ammonia) and Hydrogen sulfide
Give the order of colors in a rainbow from shortest wavelength to longest wavelength and provide approximate numeric values for the highest
Calculate the heat needed at 0 degrees Celsius in each of the following and indicate whether heat is absorbed or released: a) joules to freeze 35.2 g of water; b) joules to freeze 275 g of water; c) kilojoules to melt 145 g of ice; d) kilojoules t..
Draw a Lewis structure for each of the following compounds. Specify the hybrid orbitals that overlap to form each bond. Then label each bond as a pi or sigma bond
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