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Question- What volume of water should be added to 7 mL of a 10 mM riboflavin stock in order to create a solution with a working concentration of 350 uM?
Your answer must be supported by illustrations, Please answer with work shown to receive points
The molecular weight of A was found to be 72.06 g mol^-1. Ketones B and C were found to have identical elemental analyses, which were C, 69.72
Assuming 100% trapping efficiency because no weight gain was observed in a second Tenax tube placed in series after the first, what was the contaminant concentration in the air in ppm. The ambient temperature was 18 degrees C and pressure was 750 ..
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
positrons cannot penetrate matter more than a few atomic diameters but positron emission of radiotracers can be
calculate the amount of heat required to heat a 3.9 gold bar from 27 to
If there are three electrons in 2p, the electrons will differ in: a) principle quantum number b) secondary quantum number
The boiling point of ethanol is 78.3 C. Calculate the D S for vaporization of 0.5 mol of ethanol.
what is the ph of a solution prepared by mixing 25 ml of 0.10 m methylamine with 25 ml of 0.10 m methylammonium
Calculate the equilibrium concentrations if the initial concentrations are 2.31M N2 and 0.54M O2. (This N2/O2 concentration ratio is the ratio found in air.)
Explain what is the height of a column of liquid in a barometer if the density of the liquid is 1.076 g/mL as well as the local atmospheric pressure is 0.87 bar
The balloon is designed to continue its ascent to an altitude of 30 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
A quantity of N2 occupies 62.2 L at a partic- ular temperature and pressure. Its density is 0.900 g/L. How many moles of N2 are in the container?
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