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How many grams of NaCl would be formed from 100 grams of Na2CO3 in the following reaction?
Na2CO3 + 2 HCl ? 2 NaCl + CO2 + H2O
Calculate the volume (mL) of a .150 M KOH solution that will completely neutralize 10.0mL of a 0.560 M H3PO4 solution?
Calculate the pKa of the second ionizable group of Z.
What type of bonding between amino acid residues is most important in holding a protein and polypeptide in a specific secondary configuration?
What was the highest alcohol density reported and what was the lowest alcohol density reported by the two students?
Iridium-192 has a half-life of 74 days. What fraction of a sample of this isotope will remain after 222 days
A dog sits 1.07 m from the center of a merry go-round with an angular speed of 1.44 rad/s. If the magnitude of the force that maintains the dog's circular motion is 41.2 N.
the electron in the n=5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
Calculate the molar solubility of AgCl in a solution made by dissolving 10.0 g of CaCl2 in 1.00 L of solution.
Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If 0.33 mol H2S is placed in a 4.7 L container
If 125 cal of heat is applied to a 60.0 g piece of copper at 25.0 C, what will the final temperature be? The specific heat of copper is 0.0920 cal/(g.C}) .
Electrons can be used to probe the arrangement of atoms on a solid surface if the wavelength of the electrons is comparable with the spacing between the atoms
An aqueous solution contains the amino acid glycine. Assuming that the acid does not ionize in water, calculate the molality of the solution if it freezes at -1.1 degree centigrade.
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