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Presume a solution was too concentrated for an accurate reading with the spectrophotometer. The concentrated solution was thinned by placing 1.00 mL of the concentrated solution in 4.00mL of water. The solution was then placed in the spectrophotometer as well as an absorbance was obtained and after a few calculations the molar concentration was computed to be 3.5 × 10-6 M. Explain what was the concentration of the original solution
What is the molarity of a solution prepared by dissolving 10.5 grams of NaF in enough water to produce 750 mL of solution
For the gas-phase reaction shown below, choose the answer which indicates how the rate of change of H2O is related to the rate of change of C3H6.
We recently did a lab/demo using the NMR to observe Na ions in sodium complexes in our Inorganic Class. I understand most of the post lab questions, but there are a few that still have me stumped.
Calculate the mole fraction of the salt in the solution.
Rank the subsequent gases in order of their speed of diffusion through a membrane, and Compute the ratio of their diffusion rates: HCL, F2, Ar
A student attempted to identify an unknown compound by the method used in this experiment. she found that when she heated a sample weighing 0.4826 g, the mass barely changed, dropping to 0.4855 g.
Draw molecular structure of the following compounds. Identify the : paraffins, olefins, alkynes, naphthenes,and aromatics.
Explain why we take two consequent concurrent reading for calculation in titration. Explain is there any specific reason for that
1. a 0.421g sample of aspirin prepared in the laboratoryis dissolved in 95 ethanol diluted with water and titrated
A large cylinder of He gas,such as that used to inflate balloons,has a volume of 25.0 L at 22 Celsius and 5.6 atm. how many moles of He are in such a cylinder ?
the solubility of the k3fec2o43.3h2o product at 00c is 4.7 g per 100 g water. given this calculate the maximum percent
What peptide remains after two sequential Edman degradations of the pentapeptide Ser-Pro-Gly-Phe-Arg
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