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Cesium has the smallest ionization energy of all the elements (376 kJ/mol), and chlorine has the most negative electron affinity (-349 kJ/mol).
An insulating rod of length 14.0 cm is bent into the shape of a semicircle and has a uniform total charge of -7.5 uC, Calculate the magnitude and direction of the electric field at the center of the s
Consider the combustion reaction between 27.0 mL of liquid methanol (density = 0.850g/mL) and 13.5 liters of oxygen gas measured at STP. The products of the reaction are CO2(g) and H2O(g).
Calculate the overall energy changes (in kJ/mol) for the formation of MgF and MgF2 from their elements. The lattice energy for MgF2 is + 2952 kJ/mol.
To melt an ionic solid, energy must be supplied to disrupt the forces between ions so the regular array of ions collapses. If the distance between the anion and cation in a crystalline solid decreas
Calculate your quantities of starting materials requaired in order to obtain a yield of 0.5 g of aspirin (acetylsalicylic acid). Reaction: Salicylic acid + Acetic anhydride --> acetylsalicylic acid
A beaker of mass 325 g is sitting on a table. The beaker is filled with 210 g of water. The beaker and water are initially in thermal equilibrium at 22 ?C, What is the specific heat of the beaker
The variation of the atmospheric pressure p with altitude h is predicted by the barometric formula to be p = p0 e^(-h/H) where p0 is the pressure at sea level and H=RT/Mg with M the average molar ma
what common laboratory test of viscoelasticity does this test most closely correspond? Estimate the average life of the same tubing in the same rupture test at 30 deg C and 37 deg C
Which of the following set of quantum numbers (ordered n,l,ml,ms) are possible for an electron in an atom
What amount of HCl gas must be added to 1.00 L of a buffer solution that contains [acetic acid]=2.0M and [acetate]=1.0M in order to produce a solution with pH= 4.16
A cylindrical tube is closed at both ends by glass plates 10.0mm thick. if the inside length of the tube is 7.5 cm, what is the total optic path length between the outer surfaces
Calculate the molar solubility of silver carbonate in a solution that already contains 2.2 x 10-3 M silver nitrate, AgNO3. Ksp=8.85 x 10^-12.
Calculate the concentration of I- in a solution obtained by shaking 0.10 M KI with an excess of AgCl.
A guitar string is 90.0 cm long and has a mass of 3.27g . From the bridge to the support post (=?) is 60.0 cm and the string is under a tension of 514 N
prepare 3.9L of a HCN/NaCN buffer that has a pH of 9.70 and an osmotic pressure of 1.27atm at 298K. What masses of HCN and NaCN should you use to prepare the buffer
It takes 50% of NaOH to prepare .6 Normality of NaOH. How much of 50% of NaOH to prepare 50 Liters of solution
Two specks of dirt are trapped in a crystal ball, one at the center and other halfway to the surface, what is the refractive index of the ball
Lead poisoning in children used to be treated with intravenous injections of EDTA. If the concentration of EDTA in the blood of the patient is 2.60x10^-8 M and the formation constant for the complex
Describe the color change of a positive Benedicts test and What group reacts with the Benedicts reagent
The total electric field consists of the vector sum of two parts, Find the magnitude and direction of the total field, Specify the directional angle relative to the x axis
Write the balanced equation for the yeast using glucose to produce energy, ethanol and carbon dioxide.
A small piece of dust of mass m = 1.2 g travels horizontally through an electric air cleaner in which the electric field is 472 N/C, What is the charge of the dust particle
You need to produce a buffer with pH = 4.1 by dissolving a weighed amount of sodium formate (FW = 68.0072) in 500-mL of 0.45-M formic acid
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 13 m/s, What is the speed of the ball 0.8 seconds after it was kicked, What is the maximum hei