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Two substances A and B, initially at different temperatures, come into contact, and reach thermal equilibrium at 46.7 degrees celsius. The mass of substance A is 1.65g and it is initially at a temperature of 20.5 degrees celsius. The mass of substances B is 25.2-g and it is initially at a temperature of 52.7 degrees celsius. If the specific heat of substance B is 1.17 J/g-degrees celsius, what is the specific heat of substance A?
write the full electronic configuration for sr he zn
How much heat energy, in kilojoules, is required to convert 74.0 g of ice at -18.0 C to water at 25.0 C ?
The dried precipitate weighs 10.3g. Calculate the amunt of MgCl2 in the original sample (in weight percent).
You have 250.0 mL of a 0.56M solution of sodium acetate. How many mL of 0.50M acetic acid should be added to make a buffer of pH 4.40.
write molecular, complete ionic, and net ionic equations for the reactions that occur, if any, when solutions of the following substances are mixed? a. nitric acid and potassium carbonate
A sample of chromium (III) oxide, Cr2O3, contains 0.599 g of chromium. What mass of oxygen is present
the rotational temperature θR=0.0538 k and the vibrational temperature θv = 308.65 K. would the vibrational contributions to U-U(0) and Cv still be significant at 100K? please explain.
The d-d transition in [Ti(H2O)6]+3(aq) produces an absorption maximum at 500 nm. What is the magnitude of ? for this complex in kJ/mol? HINT: E = h ? and c = ? ? Enter your answer using 3 significant figures.
Draw the Newman projections and the corresponding potential energy diagram of n-butane conformers, rotating along C2-C3.
A volume of 60.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4)What was the molarity of the KOH solution if 22.2 mL of 1.50 M H2SO4 was needed?
A 2.95 -g sample of an unknown chlorofluorocarbon is decomposed and produces 585ml of chlorine gas at a pressure of 748 mmHg and a temperature of 298K.
Calculate the theoretical yield of C2H5Cl when 124 g of C2H6 reacts with 219 g of Cl2 , assuming that C2H6 and Cl2 react only to form C2H6Cl and HCl.
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