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Problem- If you flip an unbiased green coin and an unbiased red coin five times each, what is the probability of getting four red heads and two green tails?
Determine the solution for the above problem express your work in detail
Problem- Using 25 mL volumetric flaks, prepare a minimum of 5 dilutions of the stock 250 ppm calcium solution to cover the range of 1-20 mg/L of calcium. Diluting to the mark with 0.50 M HCl.
Equilibrium system given: Fe3+(aq) + SCN- (aq) FeSCN2+(aq) 1. Equilibrium system Net ionic equation 2. Equilibrium system + 1M Fe(NO3)3 Net ionic equation What stress caused the equilibrium to shift and in which direction it shift
Choose the answer in which the three atoms and/or ions are listed in order of increasing EXPECTED size (smallest particle listed first) assuming that the simple shell model of the atom is correct.
Problem- Using the value of Ksp for Ag2S, Ka1 and Ka2 for H2S, and Kf = 1.1 105 for AgCl2-, calculate the equilibrium constant for the following reaction. Ag2S(s) + 4 Cl-(aq) + 2 H+(aq) 2 AgCl2-(aq) + H2S(aq)
A student titrated a sample containing 105 ml of 0.28M NaOH with 0.74 M HCL. Explain what is the pH of the solution after 23 ml of the hydrochloric acid has been added
The reuseable booster rocket of the U.S space shuttle emplot a mixture of aluminum and ammonium perchlorate for fuel. A possible equation for this reaction is: 3Al(s)+ 3NH4ClO4(s) --> Al2O3(s) + AlCl3(s)+3NO3(g)+ H2O(g)
How many milliliters of .040 M NaOH are needed to exactly neutralize 100.0 mL of an HNO3 solution with a pH of 2.50
A reaction that is second order in one reactant has a rate constant of 4.0 x 10^-2 L x Mol^-1 s^-1 . If the initial concentration of the reactant is 0.380 mol x L^-1, how long will it take for the concentration to become 0.190 mol x L^-1
The standard cell potential (E°) of a voltaic cell constructed using the cell reaction below is 0.76 V: Zn (s) + 2H+ (aq) ? Zn2+ (aq) + H2 (g) With PH2 = 1.0 atm and [Zn2+] = 1.0 M, the cell potential is 0.42 V. The concentration of H+ in the cath..
The pressure in a sealed flask is 2.3 atm at 30. degrees Celcius. What would be the temperature of the flask (in degrees Celcius) if the pressure inside the flask was decreased to 1.1 atm. (Assume that the volume of the flask does not change with ..
Calculate the number of grams of CuSO4 needed to make 50.0 ml of a .25M solution of CuSO4 in 3.0M HCl.
nbspwhen sodium chloride nacl reacts with silver nitrateagno3 silver chloride precipitates. determine the mass of
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