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metal sample weighing 37.6 grams which has been heated to a temperature of 100 degree c in boiling water, was placed in 48.6 grams of water in a calorimeter, the inital temperature of the water was 25.2c at equilbrium the temperature of the water and metal was 30.4 degree c.
- what is the change in heat content,q, for the water in joules ( how much heat flowed into the water)
A substance, A2B, has the composition by mass of 60% A and 40% B. What is the composition of AB2 by mass?
The pentapeptide leucylglycylthreonyltyrosylalanine is first incubated with l-fluoro-2,4-dinitrobenzene (FDNB). When the resulting compound is heated to 110oC for 24 h in the presence of 6 M HCl, the solution will contain
limestone is decomposed by heating to quicklime and carbon dioxide. Calculate how many grams of quicklime can be produced from 1.0 kg o limestone.
What is the difference in volume (in mL) between the water vapor and liquid water? (Assume the density of liquid water is 1.0 g/mL.) C. Why is it dangerous to heat a closed container of liquid to its boiling point?
Write electron configurations for the following ions, and determine which have noble-gas configurations. Explain your answer. (a) Cr^3+ (b) N ^3- (c) Sc^3+ (d)Cu^2+ (e)TI^+ (f)Au^+
Determine how much Ammonia would be formed if 187 grams of calcium carbonate CaCO 3 are formed?
Cortisol ( M=362.47g/mol); Corisol is 69.6% C, 8.34% H, 22.1% O by mass. What are the empirical and molecular formula?
A voltaic cell made of a Cr electrode in a solution of 1.0 M in Cr^3+ and a gold electrode in a solution that is 1.0 M in Au^3+.
Octane is a liquid component of gasoline. Given the following vapor pressures of octane at various temperatures,estimate the boiling point of octane in Leadville, Colorado, where the atmospheric pressure is 496 mmHg.
A sample of gas occupies 250 mL at STP. What is the temperature if the gas expands to 1500 mL at a pressure of 0.500 atm?
Calculate the minimum wavelength of light (in nm) that could break an oxygen-oxygen double bond given that it takes 499 kJ to break on mole of these bonds.
175g pure H2O was placed in a constant-pressure calorimeter and chilled to 10C 9.8g pure H2SO4 (also 10C) was added, stirred and the temperature rose to 19.8C.
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