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When 25.0 mL of 0.500 M H2SO4 is added to 25.0 mL of 1.00 M KOH is a coffee cup calorimeter at 23.50 degree Celsius, the temperature rises to 30.17 degree Celsius. Calculate the delta H of the react
A chemical reaction takes place inside of a simple constant pressure calorimeter that contains 100g of water. The temperature changes from 25 degrees C to 29 degrees C. What is the enthalpy (Δ
What mass of cesium bromide must be added to .500 L of water (d =1.00g/mL) to produce a 0.687 m solution? What are the mole fraction and the mass percent of CsBr?
The density of a particular brand of gasoline at room temperature is .70g/mL. If the gas tank of a car holds 10.0 gallons, what is the mass of a tankful of gasoline?
What is the pH of a solution containing 0.010 HCl plus 0.040 KClO4 with an activity coefficient of [H+] = 0.86?
Question: 6g of metal M react with 23.66g of chlorine to form 29.66g of the metallic chloride. Find the empirical formula of the metallic chloride. (M = 27,Cl = 35.5)
What is the freezing point in (C) the solution below? For water, Kf=1.86 (Ckg)/mol. The vapor pressure of water at 45.0 C is 71.93mm Hg.
What type of molecular orbitals does the cyclopentadienyl ligand (in a ferrocene molecule) use to bond with the iron ion? How many electron pairs does each cyclopentadienyl ligand donate to the iron
If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00M and 2.00M, respectively, what will the concentration of HCONH2 be at equilibrium?
What is the pressure the basketball exerts on the ground, if the contact area between the ball and the ground is a circle with radius 8 cm? Give answer in Pascals. Show work.
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 3.17 A, and the density of the crystal is 6.99 g/cm^3. Calculate the atomic weight of the element.
What amount of 0.02000 N sulfuric acid, in milliliters, is required to neutralize 1.0 L of the finished water, assuming that the alkalinity (buffering capacity) of the water is zero?
How many electrons must be gain or lost by each element to achieve a noble gas configuration of electrons. ( answer selection : Gain or lost)
However, if you mixed them together and took the melting point, it would not be 140.1 - 140.4 °C. Why not? What would happen to the melting point and the range?
Pure aluminum is ductile metal withlow tensile strength and hardness. Its oxide Al2O3 (alumaina) is extremenly strong, hard, and brittle. Can you explain this difference from am atomic bonding poi
How many grams of ethyl alcohol, C2H5OH, must be added to 1.000 kf of water so that the solution will not freeze until -20 degrees C?
The reaction for plant photosynthesis of glucose sugar and oxygen gas is:
The method of initial rates involves substituting the initial reactant concentrations into rate calculations. When you do the experiment, you will be given KMNO4 and H2C2O4 solutions of know concent
Calculate the molar concentration of H+ ions in a solution made by diluting 25 mL of 0.1 M HNO3(aq) to 500 mL with pure water.
Question: A solution is prepared by diluting 25.00 ml of a .308 M solution of NiCl2 to a final volume of 0.500 L. What are the concentrations of the invidual ions Ni and Cl in this solutions?
A 158.5 mg sample of pure Cu metal is dissolved in a small amount of concentrated nitric acid giving Cu2+ ions in a solution. It is then diluted to a final volume of 1.00 L. What is the molar concentr
At 25 C, the rate constant is 3.0 x 10^-4/M sec. Calculate the rate at this temperature if (NH4+)=0.26 M & (NO2-)=0.080 M
Calculate the pH after the following volumes of titrant has been added: 0.0 mL, 10.0 mL, 20.0mL, 35.0mL, 36.0mL, 37.0mL. Determine the K value for the reaction of NH3 with the HCl.
The compound MgI2 times XH2O is analyzed to determine the value of X. A 1.557-g sample of the compound is heated to remove all the water, 1.0254 g of MgI2 remains after heating. What is the value of
Question: What mass of copper would you expect to be deposited from a copper (II) sulphate solution using a current of 0.50 A over 10 seconds?