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Problem- Lysine is used as a topical medicinal skin creme. What is the molecular formula of lysine if the empirical formula is C3H7NO, and the approximate molar mass is 146 g/mol
Anyone can tell me how to solve it step by step so that I will be able to understand what is going on?
C5H12, 10.0 g hexane, C6H14 and 10.0 g benzene, C6H6. What is the mole fraction of hexane?
completely reacts. What is the mass (s) consumed during the reaction?
in a titration experiment it was found that 15.38ml of 0.139m naoh was required to neutralize a 25.00 ml sample of hcl.
The enthalpy of combustion for propane is -2044 kJ/mol. How many liters of propane (at STP) must be burned in order to convert 552 grams of ice initially at -11°C to liquid water at 89°C
Lead poisioning in children used to be treated with intraveneous injections of EDTA. If the concentration of EDTA in the blood of a patient is 2.90x10^-8 M and the formation constant for the complex
Calculate the lime dosage required for soften- ing by selective calcium removal for the following water analysis. The dissolved solids in the water are CO2 = 17.6 mg/L, Ca2 + = 63 mg/L, Mg2 + = 15mg/L, Na + = 20mg/L, Alk (HCO3- )
a certain substance has a molar enthalpy of vaporization of 31.6 kjmol. how much of the substance is in a sample that
If 110mg of fluorine-18, which has a half-life of 110min, is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.?
Thirteen grams of titanium react with 60.0 g of bromine. How many grams of titanium(IV) bromide are produced, assuming 100% yield? How many grams of excess reagent are present after the reaction?
In the experiment you used a less amount of sulfuryl chloride than it is theoretically required for converting all the starting 1-chlorobutane to the dichlorinated products. Why
Consider a colloidal suspension(like a solution) of very small particles in a solvent. We may think of this as an ideal gas of particles in the external field due to gravity.
The following thermochemical data are for 25oC. H0f Cp H2O(l) - 286 kJ mole-1 + 75.3 joule mole-1 K-1 H+(aq) 0 0 OH-(aq) - 230 kJ mole-1 + 148 joule mole-1 K-1 For the self-ionization of water, H2O (l) H+ (aq) + OH-- (aq) What is the value of ?H..
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