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If 10.0 mL of 0.00200 M KNCS is mixed with a very large excess of Fe(NO3)3, how many moles of FeNCS2+ product should form
What volume of CO2 (g) at STP is formed when 6.00 g of cyclopentadiene, C5H6 (g) is fully oxidized
Does GLC analysis allow you to skip the IR analytical method? Compare the two methods for advantages and disadvantages.
A black precipitate remaining from the seperation of Cr^3+ and Fe^2+ ions is dissolved in HCl and HNO3. Some NH3 is added, followed by several drops of dimethylglyoxime. (a). A colorless solution re
The addition of s^2- ion to Fe(OH)2(s) results in the formation of FeS(s). Explain why the addition of S^2- ion to Cr(OH)3(s) does not result in the formation of Cr2S3(s)
A solution contains either cr^3+ or Ni^2+ ion. describe a reaction with a single reagent that will identify which ion is present
Draw the Lewis structures for the following compounds. 1) PBr3 Using VSEPR, what is the shape about the P. 2) N2H2 3) CH3OH Using VSEPR, what is the shape about the C and about the O? 4) CO2 Using V
Students were instructed to mix the benzaldehyde and acetone starting materials in their conical vials before adding the ethanolic sodium hydroxide solution. a. Why was this essential to the success
A 0.140-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
A mixture of 80.0mL of hydrogen and 60.0mL of oxygen is ignited by a spark to form water. a) Does any gas remain un-reacted. Which one. b) What volume of which gas (if any) remains un-reacted
The ionization constant or dissolution constant (KA) for acetic acid (HAc) is 1.8×10-5. (1) Write down the dissociation reaction. (2) Estimate pH of a solution containing 0.6 g of acetic acid
For a metal salt (MX3) that has a Ksp value of 3.5 x 10-5, what is the delta G for the following reaction? M3+ + 3 X- <-> MX3(s)
The standard free energy change for N2O4(g) ? 2 NO2(g) is 5.4 kJ at 25oC. a) What is the equilibrium constant for this reaction? b) What is ?G if we set up the flask to start with 0.450 atm N2O4 and
What would you guess is the sign for the change in entropy for this reaction. b) What is the expected sign for the change in free energy for this reaction c) Finally, what is the expected sign for t
Determine the direction of a reaction in a solution containing initially 10-4M acetaldehyde, 0.1M ethanol, 0.1M pyruvate, and 10-2M lactate. What is the value of Gibbs' function for this reaction
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.200 M sodium benzoate. How much of each solution should be mixed to prepare this buffer
A gas cylinder with a movable piston initially contains .25 moles of neon in a 5 L. If .5 moles of helium are added to this gas cylinder, what will be the final volume
The cranberry juice control is 27% juice when purchased from a local grocery store. Provide the calculations required to prepare the series of standard solutions of cranberry juice
A pickle is made by soaking a cucumber in brine, a saltwater solution. What makes the smooth cucumber become wrinkled like a prune
In the laboratory a student combines 25.5 mL of a 0.203 M sodium nitrate solution with 24.3 mL of a 0.375 M manganese(II) nitrate solution.
What mass in grams of KNO3 will crystalize out of solution
A tiny speck (8.3 x 10-7 mol) of americium-241 is used in smoke detectors, how many atoms of americium-241 are there in one of these smoke detectors?
An element has two common isotopes. 98.89% of its atoms have an atomic mass of 12.09 amu, whereas the other 1.11% have an atomic mass of 13.10 amu. Using the isotopic composition provided, calcul
If 1.87 {rm g} of acetic acid(rm CH_3CO_2H) reacts with 2.31 {rm g} of isopentyl alcohol(rm C_5H_{12}O) to give 2.96 {rm g} of isopentyl acetate(rm C_7H_{14}O_2), what is the percent yield of the
Can anyone explain the intermediate compound formation theory in detail