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A 48.0-g sample of an unknown metal at 99°C was placed in a constant-pressure calorimeter containing 90.0 g of water at 24.0°C. The final temperature of the system was found to be 28.4°C. Calculate the specific heat of the metal in J/g · °C. (The heat capacity of the calorimeter is 13.4 J/°C.)
in the olympics and other major athletic competitions a gc-ms is used to screen athletes for their use of banned
1. Describe the difference between the reaction quotient and the equilibrium constant.
If 225.6 grams of calcium phosphate are produced in a precipitation reaction, how many moles of the salt have been formed
The Coal is fed with 200% excess water ( excess is calculated with respect to CO formation) 100% of coal is consumed. the selectivity to CO (with respect to CO2) is 1:1 the functional conversion of the CO is 50% what is the final gas composition? ..
Calculate the solubility-product constant for Zn3(AsO4)2. Ksp = (c) The Ksp of Ag2CO3 at 25 oC is 8.46e-12. What is the molar solubility of Ag2CO3? solubility = mol/L
Briefly draw a procedure you could use to determine the HC2H3O2 concentration in a vinegar sample. Explain what would be the pH at the equivalence on the titration
the mass of a crucible and hydrated salt was found to be 21.447 g. the mass of the crucible and the anhydrous salt was
Define the metabolism of on glycerol trioleate, C51 H93 O6, a common fat, produces 3.022*10^4kj of heat. Explain how many grams of the fat must be burned to increase the temperature of 50g of water from 25 degrees Celsius to 30 degrees Celsius
the process (A-> B is first order with a half-life of 0.21 seconds. How long would it take for 15.0M of A to decrease to 0.25 M?
The PPT was washed and ignited to remove impurities. The amount of Barium sulfate obtained was 10g. What weight of the sulfate ion was used?
Write a balanced chemical equation for the reaction of HNO3 with S to form H2SO4, H2O and NO2. How many moles of HNO3 and H2O are there
a gas sample containing 1.45 mol at 25degc exerts a pressure of 397 torr. some gas is added to the same container and
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