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If I have 2 mM of pyrene in decane, how do I make 10 uM, 0.5 mM, 1.0 mM, and 1.5 mM solutions using the density of decane (0.73 g/mL)?
Galactose is concentrated in a cell by a transporter driven by ATP hydrolysis. What is the ratio of ADP to ATP required to maintain a galactose concentration gradient of 100,000:1
Calculate the molar mass of the uknown compound. The boiling point elevation constant for water is0.52°C/m
A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?
How to calculate the volume of 1.5M aqueous pottasium hydroxide require to react completly with 2g of benzoic acid and extract the solution twice using the volume calculated?
Introduced into a 1.70 L flask is 0.120 mol of PCl5 ; the flask is held at a temperature of 227 C until equilibrium is established. PCl5(g) PCl3(g) + Cl2(g) What is the total pressure of the gases in the flask at this point
The vapor pressure of mercury is .0127 torr at 50 degrees celcius and .0888 torr at 80 degrees celcius. calculate the enthalpy of vaporization of mercury
NIST-JANAF table deltaG standard formation values at 5400 K for N(g), O(g) and NO(g) are 113.817 kJ/mol, -108.155 kJ/mol and 23.568 kJ/mol.
Calculate the concentrations of all species in a 1.10 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
oxygen gas is collected over water at 25 degrees C. The total pressure of the gas is 780.00 mm Hg. What is the partial pressure of the dry oxygen gas?
At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr?
A compound with a molecular formula C9H12, showed the following signals in its 1H NMR spectrum: ? (CDCl3, ppm): 7.5-7.0 (m, 5H), 2.3 (septet, 1H), 1.3 (d, 6H).
Calculate ground state energy, 1st excited energy level, and wavelenght of an electronic transition between the 2 lowest energy states for an electron
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