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If a 1.8 mole sample of a compound weighs 195 g and is found to be 11.18% H and 88.82% C. explain what is the molecular formula for the compound?
The rate constants for a first order reaction are found to be 2.76 x 10-5 s-1 at 25 degrees and 6.65 x 10-4 s-1 at 50 degrees C, respectively. A) calculate the rate constant at 75 degrees C
Hemoglobin is the protein that transports oxygen in mammals. Hemoglobin is 0.342% Fe by mass, and each hemoglobin molecule contains four iron atoms. Calculate the molar mass of hemoglobin
Chromium metal (Cr) can be perpared by reacting to the oxide with aluminum. THe equation for the reaction is Cr2O3 + 2 Al = 2 Cr + AL2O3
How many mL of 4.50 M sodium hydroxide must be added to 250 mL of a 0.200 M nitrous acid solution to make a buffer with pH = 3.00?
Define the Joule-Thomson coefficient µ,derive an explicit form of JT coefficient and evaluate its value for an ideal gas.
What will be the total volume of solution, in ml, when the concentration of 175.0 ml of 0.100 M K3PO4 solution is decreased to 0.012M
Compute the initial pressure of the gas in the cylinder. b. Compute how much heat must be added to the gas in the cylinder for the spring to compress by 2cm
Which of the following Bronsted-Lowry acids does NOT behave as a strong acid when it is dissolved in water. A) HBr B) HCl C) HNO2 D) HClO4
The molecular weight of ibuprofen was determined by mass spectroscopy to be 206.287 g/mol. What is the molecular formula for ibuprofen?
the activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that has an energy of 160.0 kJ or greater at 500 K.
9.2 l of liquid water at 25c is combined with 1.0 kg of liquid h2so4 at 25c. estimate the temperature of the sulfuric
silver has only two naturally occurring isotopes 107ag with a mass of 106.90509amu and an abundance of 51.84% and 109ag with a mass of 108.9047 amu calculate the atomic mass of silver.
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