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A sample of limestone and other soil materials is heated, and the lilmestone decomposes to give calcium oxide and carbon dioxide.
CaCO3 (s) = CaO(s) + CO2(g)
A 1.506-g sample of limestone-containing material gives .558 g of CO2 in addition ti CaO, after being heated at a high temperature. What is the mass percent of CaCO3 in the original sample?
Compare the results of your calculations from 2 and 4 above with the actual molarity of the Ba(OH)2 solution. Which method of analysis, equivalence point or gravimetric determination, was more accurate in your experiment. Why
Which of the following conclusions is correct for the change in entropy for this reaction. You must find all of the correct answers.
a) What must be the velocity of electrons if their associated wavelength is to equal the longest wavelength line in the Lyman series
Given Data; P4+6Cl2=4PCl3 change temp= -2439 kj ,4PCl5=P4+10Cl2 change temp= 3438 kj calculate change in temp for the reaction PCl5=PCl3+Cl2.
A typical protein contains 16.2 wt% nitrogen (N). A 0.500 mL sample of protein solution was decomposed, and the liberated ammonia (NH3) was reacted with 10.00 mL of 0.02140 M HCl.
Using the thermodynamic cycle in the tight binding KNI-764/HIV-1 protease example discussed in class, derive the Kapp= KKNI-764/(1+KAc-pepstatin[AcPepstatin]) for the apparent affinity constant (Kapp) for the competition assay between the weak (Ac..
Carbon Monoxide is a toxic pollutant found in our city air. On a particular day, the air contains 6.50mg of CO per 1.000X cubic meter of air. How many grams of CO are present in a room whose dimensions are 15.0 meters X 11.0 meters X 16.5 meters?
Calculate the pH of the solution that results when 20.0 mL of 0.200 M formic acid is mixed with 25.0ml of 0.200 sodium formate solution
Ethanol, C2H5OH, boils at 78.29 degrees celsius. How much energy, in joules, is required to raise the temperature of 1.00 kg of ethanol from 20.0 deg C to the boiling point and then to change the liquid to vapor at that temperature.
There are four cadmium atoms and four tellurium atoms per unit cell. How many of each type of atom are there in a cubic crystal with an edge length of 5.00 nm?
To obtain the same antifreeze protection requires 76 of propylene glycol to replace each 62 of ethylene glycol. Calculate the mass of propylene glycol required to replace 1.00 of ethylene glycol. The density of ethylene glycol is 1.12.
Identify which element is oxidized and which element is reduced in the following: 4NaCl + 2H2SO4 + MnO2 à 2Na2SO4 + MnCl2 + Cl2 + 2H2O
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