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In the laboratory a student named Georgia weighed 5.95 g of an unknown solid mixture containing benzoic acid, copper (II) sulfate, and sand. She added 15 mL of acetone to her sample and dissolved one of the components of the mixture. Which component dissolved in the acetone
unknown substance in 30.0 g of cyclohexane was found to freeze at 3.1 degree celcius . what is the molar mass of the unknown substance?
Calculate the values of the rate constant k assuming that the reaction is first order
What type of rotation axis does the structure have parallel to the [0 0 1] direction and show the location of this axis in a [0 0 1] projection of this crystal structure?
The sum of the substituent positions do not add up to lowest possible number. -The double bond in the ring does not contain the number one carbon. -Molecule has no cis-trans isomers. -The wrong name for the benzene derivative is used
Hydrobromic acid reacts with potassium carbonate to form potassium bromide,carbon dioxide , and water. Barney the incompetent lab tech accidently knocked a flask containing 255ml of 0.500 M hydrobromic acid onto the floor, and now he has to clean ..
Which of the followling molecules would have resonance structures. Select all that apply. (You should draw all resonance structures for the molecule(s). Answer a. NI3 b. O3 c. CCl4 d. CH3NH2 e. NO3-
The Bracket series of emission lines falls in the infrared region of the em spectrum, and each line is a result of an electron falling from a higher Bohr orbit to the n=4 level.
A bicycle tire is filled with air to a pressure of 720 torr at a temperature of 19 degrees Celsius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees Celsius.
What is the pH of a buffer prepared by adding 0.809mol of the weak acid HA to 0.305mol of NaA in 2.00L of solution? the dissociation constant Ka of HA is 5.66x10^-7
for na and mg ions compare the ratios of the number of ions in the 3p excited state to the number in the ground state
A nugget of pure gold of 4.80 grams is absorbed 284 Joules of heat. if the initial temperature was twenty eight degree Celsius then what was the final temperature of the Au? The specific heat of gold = 0.129 J/(g·°C)?
(One amp-hour is the charge that passes through a circuit when 1 Amp flows for 1 Hour). What mass of Zn is consumed when 35 amp-hours are drawn from the cell?
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