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24-Determinethe empirical and molecular formulas of each of the following substances. a) Epinephrine (adrenaline), a hormone secreted into the bloodstream in times of danger or stress 59.0% C,7.1% H, 26.2% O, and 7.7% N by mass MW about 180amub) Nicotine a component of tobacco- 74.1% C, 8.6% H, and 17.3% N by mass molar mass = 160± 5 g
What is the concentration of HNO3 if 9.20×10?2 mol are present in 825 mL of the solution
What is the empirical formula of a 0.01510 g sample gives 0.01102 g of H2O and 0.04484 g of CO2 on combustion? b) if you dissolve 1.000 g of the powder in 100.000 g of camphor, you find that the melting point of the solution is 177.05 C. Pure camp..
Oxygen is prepared by heating potassium chlorate with manganese dioxide as a catalyst. 2KClO(*3*)(S)?2KCl(S)+30(*2*)(g) How many grams of oxygen would be obtained from 1.500g of potassium chlorate
The vapor pressure of the liquid C4H10 is 562.7mmHg at a temperature of 264.6K. The enthalpy of vaporization for this liquid is 22.4kJ/mol. What is the vapor pressure of C4H10 at a temperature of 286.6K in mmHg
If you thought you had discovered a new element, how could you get the scientific world to accept your discovery. What roadblocks might you face, working outside the science community. How could you avoid being labeled a "crackpot"
q1.if 21.64ml of 9.44times10-4m kmno4 solution is required for the titration calculate how many mgs of ca2 are present
The normal melting and boiling points of O2 are -218C and -183C respectively. Its triple point is at -219C and 1.14 torr, and its critical point is at -119C and 49.8 atm.
A gas occupying a volume of 725mL at a pressure of 0.970 atm is allowed to expand at a constant temperature until its pressure reaches 0.541 atm. What is its final volume
an equilibrium mixture of pcl5g pcl3g and cl2g has partial pressures of 217.0 torr 13.2 torr and 13.2 torr
Predict the coordination number in a NiS crystal. The ionic radii for Ni+2 and S-2 are 0.069 and 0.184nm, respectively.
calculate p value for each ion Ba 2+, Mn 2+and Cl- in a solution that is 4.62 x 10^-3 M in BaCl2 and 1.78 M in MnCl2
The solubility of ammonium chloride at 70C is 60g of solute per 100g of water. What solution would be saturated at 70C
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