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What does it this mean according to the amount of pyrene and TiO2 added , the surface coverage (mol/g) could be caculated so if i have pyrene/TiO2= 50mg how can i caculate the surface coverage? water 50ml. it is sufrace coverage= 2x10^-5 mol/g
A brand of lunchmeat contains 0.11% by mass of a preservative, sodium benzoate, C6H5COONa. Health Canada recommends a an upper level intake of Na to be 2300 mg
Find the pH and volume (mL) of 0.447 M HNO3 needed to reach the equivalence point(s) in titrations of each of the following.
About how much phenacetin will remain dissolved when the water calculated (94ml) is cooled to room temperature
Use Coulomb's law to calculate the ionization energy in {\rm kJ/mol} of an atom composed of a proton and an electron separated by 80.0 pm
an experiment shows that a 115 -ml gas sample has a mass of 0.170 g at a pressure of 711 mm hg and a temperature of
The standard free-energy difference between the two chair conformations of isopropylcyclohexane is 9.2 kJ mol-1 (2.2 kcal mol-1). What is the ratio of concentrations of the two conformations (axial and equatorial) at 25 °C
A reaction vessel contains these compounds at equilibrium. What will happen if the volume of the container is reduced by 50% at constant temperature.
In a particular sample, the C13 NMR spectrum showed a signal 25ppm and another signal at 72.3 ppm. if the reference frequency for C13 on the instrument were 25.1 MHz what is the difference between the frequency of each signal and the reference fre..
CO2 properties: appearance, reaction with limewater, reaction with flame, behavior with water. If positive observation then write a balanced equation.
What would be the best indicator for the titration of 0.20 M CH3COOH titrated with 0.2 M NaOH? (Ka for acetic acid = 1.8 X 10-5) The pH ranges for the color change of some common acid base indicators are given below
The simplest alkene has the formula C2H4 and the simplest cycloalkene has the formula C2H2
At 340 K, Kp = 69 for the reaction H2(g) + I2(g) ô€• 2HI(g). 50.0 g of HI is injected into an evacuated 5.00-L rigid cylinder at 340 K. What is the total pressure inside the cylinder when the system comes to equilibrium?
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