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State the electron configurations for the following atoms. Enter full electron configuration in order electrons fill the subshells with number of electrons in the subshells in parentheses. For instance must enter "1s(2)2s(2)2p(5)" for atom of fluorine.
A student placed 16.0 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.ml mark on the neck of the flask was reached.
Write chemical equations for the reaction of fluorine with the following substances, making sure that the numbers and kinds of atoms are the same on both sides of the equations. If no reaction occurs, write noreaction
Compare the heat needed to raise the temperature of 1 cup (250 ml) of water and coffee urn with 10 gallons (38 liters) of water form 20 degrees celcuis to 90 degrees celcius
What is the pH of a solution prepared by titration 100.0 mL of 0.100 M Acetic Acid (CH3COOH) with 20.0 mL of 0.250 M NaOH
What amino acid would provide a suitable buffer at pH 7.0 when made up with NaOH and why. How many grams of this amino acid and what volume of the 0.1 mol/L NaOH would you mix to make 500 mL of a 0.01 mol/L solution of this buffer.
A 50.0mL sample of 0.0240 M NH3(aq) is titrated with aqueous HCl. What is the pH after the addition of 15.0mL of 0.0600 M HCl(aq) kb of NH3= 1.8x10^-5.
Calculate the molarity of a solution prepared by diluting 32.74 mL of 0.615 M ammonium sulfate to 490.0 mL.
what is the mass of a rectangular piece of copper 24.4 cm x 11.4 cm x 6.6 cm? The density of copper is 8.92 g/cm^3.
What kind of alcohol is formed when ethyl formate reacts with a grignard reagent, and what structural feature characterizes alcohols formed this way
If 29.58 mL of 0.550 M NaOH is required to titrate the oxalic acid in the 0.554g sample to the equivalence point, what is the weight percent of oxalic acid in the mixture. Oxalic acid and NaOH react according to the equation H2C2O4 (aq) + 2 NaOH(a..
Imagine a researcher allowed the paper chromatogram to develop for far longer than necessary in the mobile phase, such that the solvent front ran into the top edge of the paper and the spots continued to move.
If it is a buffer solution what is the pH of this buffer solution. how many mil of 1.5 M HCl can be added to this solution before the buffer is exhausted. how many ml of 1.5 M NaOH can be added to this solution before the buffer is exhausted
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