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Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S,and the third contains 0.1 mol CaCl2.
Write the net ionic equations for the precipitation reaction that occur.
What are the spectator ions in the solution?
A solution is prepared by mixing 85.0 mL of 5.00 M HCl and 25.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
Elliptical holes estimate the angle of entry : Cos A bullet hole in a wall at a crime scene is elliptically shaped. The loner dimension is 20 mm and the shorter dimension is 14 mm. What is the angle of entry?
when electrons move from the fourth energy level to the second energy level, they emit visible light. explain why the light emitted when an electron makes this move in a sodium atom is a different color than the light emitted
This increases to 0.010 Msec^-1 at 90 degrees C. Calculate the activation energy for this reaction.
2-butene-1-thiols is one component of skunk spray. How whould you synthesize this substance from methyl 2-buenoate? From 1,3-butadiene
For which of the following would a dipole-dipole interactions play an important role in determining physical properties in the liquid state. a) BF3 b)ClF c) BeCl2 d)F2 e)CCl4
Some liquid samples cannot be injected directly into an HPLC system because they could either damage the column or the HPLC system. For these samples, solid phase extraction (SPE) is used prior to analysis. Explain SPE
A wooden artifact from a Chinese temple has a 14C activity of 34.3 counts per minute as compared with an activity of 58.2 counts per minute for a standard of zero age. From the half-life for 14Cdecay, 5715 yr determine the age of the artifact.
In hydrogen bonding does the Hydrogen have to be connected to an O, N or F in its own molecule and be bonded to a O, F or N with another hydrogen
Calculate the pH and pOH of a solution that has an OH- concentration of 3.1 x 10-2M
A 5.00 Liter cylinder contains 860 g of Ar gas at 27 degrees celsius. Calculate the pressure of the gas in the cylinder
If 1.0*10^15 atoms of Radium produce an average of 1.373*10^4 atoms of Radium per second, how many liters of Radium, measured at STP, are produced per day by 3.5g of Radium?
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