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In the laboratory, a student adds 12.2 g of zinc nitrate to a 125 mL volumetric flask and adds water to the mark on the neck of the flask. Calculate the concentration (in mol/L) of zinc nitrate, the zinc ion and the nitrate ion in the solution.
Find the molality of the solution prepared by dissolving 0.238 g camphor , C10H16O , in 15.5 g cyclohexane.
Calculate the osmotic pressure of a solution containing 24.9g of glycerin (C3H8O3) in 238.0mL of solution at 300 K.
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an unstable intermediate.
Circle atoms that act as a proton acceptors when forming the bonds responsible for a proteins secondary structure. Which R group would participate in the salt bridge. Draw breaks indicating peptide bonds
You have just finished watching "A is for Atom" a film about nuclear energy made in 1953. Based on the presentation of the information,
An object has a mass of 5.95g. Assuming the density of water is 1 g/mL, what is the volume of the object including air?
You have a box of volume 1.00 liter into which you inject 2.65 g of NH3 at 600 K. What will be the final concentrations of NH3, N2, and H2 after equilibrium is established
what kind of inter-molecular interactions would likely dominate? explain your reasoning
A 0.692 g sample of glucose, C6H12O6, is burned in a constant volume, bomb calorimeter. The temperature change is measured at 1.80 degrees C.
50.0000 g of a compound showed that it contained 12.7520 g C,3.2105 g H, and 34.037 g S. The molecular weight of this compound was determined in a seperate expierment and found to be 94.19u.
What is meant by the term oxidation? On which side of an oxidation half-reaction do the electrons appear? What is meant by the term oxidant?
If 46.1 g Zn at 18.0 C is placed in 80.0 g H2O at 75.0 C, what is the final temperature of the mixture. The specific heat capacities of zinc and water are 0.388 J/g·K and 4.184 J/g·K, respectively.
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