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In a calorimetry experiment, the heat capacity of lead was investigated. A 48 g sample of lead was heated to 100 degrees C and then poured into 50 g of water with an initial temperature of 25.2 degrees C. The final temperature of the mixture was 27 degrees C. What was the experimentally determined specific heat of lead? You may assume that the heat absorbed by the calorimeter was negligible.
A student traces of brown deposite during the KMnO4 (NH4)2Fe(SO4)2 titration and quickly add more H2SO4 and continued his titration?Suggest what wil happen and why.
The solubility of barium sulfate varies with the composition of the solvent in which it was dissolved. In which solvent mixture would BaSO4 have the lowest solubility
All the following are postulates of the kinetic molecular theory of gases except A) the collisions between molecules are elastic. B) the gas molecules move randomly in straight lines in all directions.
Write a balanced (a) molecular, (b) overall ionic, and (c) net ionic equation for the reaction between an aqueous solution of phosphoric acid, H3PO4 (aq) , and an aqueous solution of sodium hydroxide. The products are sodium phosphate and water
determine the entropy change for freezing 6.33 grams of c2h5oh at 158.7 k? h -4600 jmol. express your answer in units
Caculate the wavelength of light( in nanometers) that is absorbed when the electron in a He+ ion goes from the n=2
Draw the molecular orbital diagram shown to determine which of the following is most stable. C2^2- B2 N2^2+ C2^2+ B2^2+
System conducts 1.30x10^2 cal heat to srroundings while delivering 316 cal work. What is the change in internal energy of the system (in Cal).
Determine What is the percent by mass of sodium phosphate in a 0.142M Na 3 PO 4 (aq) solution? If it is given that it has a density =1.015g/mol.
There are conventions for naming and constructing the formulas for acids and bases just as there are for other types of compounds. There are 3 main rules for naming acids.
when 7.50g of magnesium reacts with 9.50g hydrochloric acid, hydrogen gas is formed. what is the limiting reagent?
The following quantities of trace gases were found in 1 mL sample of air. Calculate the number of moles of each compound in the sample.
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