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A 4.000-g sample of the metal nitrate M(NO3)2 was dissolved in water and treated with excess aqueous sodium sulfate. The sulfate salt that formed weighed 3.318 g. Determine the identity of the metal
A piece of metal of mass 27 g at 99?C is placed in a calorimeter containing 45.1 g of water at 21?C. The final temperature of the mixture is 38.7?C. What is the specific heat capacity of the metal?
What's the best way to learn organic chem I reactions? I have looked at many flash cards and my text, but they all look different when I try to find some similarity for memorization
What would be the major product expected from sequential treatment of propylbenzene with i) Cl2 and FeCl3, ii) KMnO4, iii) H3O+, and iv) Br2 and FeBr3?
Solutions of AgNO3 and KCl are combined and 0.683 g of a precipitate are formed. What is the precipitate and how many moles were formed?
A 52.0-g sample of an alloy at 93.0°C is placed into 379 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system
According to the "7:10 Rule of Thumb," if the exposure rate one hour after detonation of a nuclear weapon is 500 R/hr, the exposure rate approximately 14 days later (343 hours) will be approximatel
The temperature of 55 g sample of a certain metal drops by 113 degreed C as it loses 837 cal of heat. What is the specific heat of the metals.
The same reaction is repeated with an initial partial pressure of 759 torr of {rm X}_{2} at 800 K; the equilibrium partial pressure of X is 518 torr.
A syringe for drawing blood commonly has an opening with a diameter of 0.514mm. If a force of 5.5. is applied to the syringe, what is the pressure of the liquid coming out of the needle.?
The acid required 27.4 mL of base to reach the equivalence point. (a) what is the molar mass of the acid? (b) after 15.0 mL of base had been added in the titration, the pH was found to be 6.50. What
What is the molarity of a nitric acid solution if 43.53 mL 0.1000 M KOH solution is needed to neutralize 20.00 mL of the acid solution?
X-rays with a wavelength of 1.16 AA scatter at an angle of 26.0 degrees from a crystal. If n = 1, what is the distance between planes of atoms in the crystal that give rise to this scattering?
)Benzene, C6H6, is an organic liquid that freezes at 5.5 C. How much energy as heat is evolved when 15.5 g of benzene freezes at 5.5 C? The enthalpy of fusion is 9.95 kJ/mol.
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol). What is the solubility product constant for Ba CO3 at that temperat
Gold has a face-centered unit cell and its density is 19.32 g/cm3 . Calculate the radius of a gold atom?
A mixture of butene and butane burn in the air to give CO2 and H2O.suppose u burn 2.86g of the mixture and obtain 8.80g of CO2 and 4.14g of H2O.What is the mass percentages of butane and butene in
A mass of 1.50 g H2O is sealed in an evacuated 3.0-L flask and heated to 55 .C. What mass of liquid water remains in the flask when equilibrium is established? The equilibrium vapor pressure of wate
What would the net ATP yield if a muscle cell takes a glucose molecule, stores it as part of a glycogen molecule and later releases it and sends it through glcolysis?
Studies are ongoing regarding the best metal to be a sacrificial anode to prevent corrosion of the rebar. Which would work better for the purpose, magnesium or zinc? Explain your answer based on the
The "Zebra" cell was invented in 1985 in South Africa as part of the "ZEolite Battery Research Africa" project, and is used in all-electric municipal buses and other vehicles. It uses nickel and mol
How many electrons must aluminum lose before it can reach a stable electronic configuration? Use the table of ionization energy to justify your answer.
An element crystallizes in a face-centered cubic lattice. If the length of an edge of the unit cell is 0.408 nm, and the density of the element is 19.3 g/cm3, what is the identity of the element?
Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C. The barometric pressure at the time was 742.5 mm Hg. What is the pressure
A physiological saline solution contains 174mEq/L each of Na+ and Cl-. How many moles each are in 1.30L of the saline solution?