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A volume of 75mL of H2O is initially at room temperature (22C). A chilled steel rod at 2.00 C is placed in the water. If the final temperature of the system is 21.0 Celsius, what is the mass of the steel bar?
Use the following values:
Specific heat of water = 4.18J/(g*C)
Specific heat of steel = 0.452 J/g*C
Express your answer to three significant figures and include appropriate units.
calculate and compare the enthalpy of monobromination and monochlorination for the given alkyl position
The second-order reaction 2 Mn(CO)5 Mn2(CO)10, has a rate constant equal to 3.0 x 10^9 M-1 s-1 at 25C. If the initial concentration of Mn(CO)5 is 2.0 x 10-5 M, how long will it take for 90.% of the reactant to disappear?
A mixture of CO, CO2 and O2 is contained within a 275 mL flask at 0C. If the total pres- sure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2?
lead nitrate is needed to precipitate all of the chloride ion in a 10.00-mL sample of an unknown. What is the molarity of the chloride ion in the student's unknown?
Calculate how many moles and grams of aluminum chloride can be made from 2.70 g of aluminum and 4.05 of chlorine. find the mass of aluminum chloride 2Al(s)+3Cl3(g)---2Alcl3(s).
A drug with the molecular formula C25H38O5 has 2.14 x 10^23 carbon atoms. What is the mass of the sample?
Why are the crude ester mixtures washed with aqueous NaHCO3?2. You wish to test 9 esters for antitumor activity. One and only one of the 9 esters will actually have antitumor activity. You will prepare the esters from an alcohol and an acid as was..
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point
Calculate the mixing ratio (ppbv) of NO2. Assume T=20 degrees Celsius = 293 K; P = Atmospheric pressure. MW of NO2 = 44g/mol.
An alien rocketship is traveling at a speed of 40 inches per minute. At this speed, how many feet will it travel in 1 second? Round to the nearest thousandth.
22.4 liters of a gas weighs 70g at S.T.P. Calculate the weight of the gas if it occupies a volume of 20 liters at 27C and 700mm Hg of pressure
A corrosion potential of -0.299 V versus SCE was measured for a corroding alloy. what was the potential versus SCE?
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