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Show your calculations for preparing the following solutions: 200ml of 20% (w/v) NaOH, 1 liter of 1.0M Tris [molecular weight (wm)= 121.1g/mol], and 100ml of 0.2M EDTA (mw =372.2g/mol)?
AgBr is the light-sensitive compound in most photographic films. Assume, when film is exposed, that the light energy absorbed dissociates the molecule into atoms.
during the late 1800s hard rock miners replaced candles with carbide lamps for work in mine shafts. the lamps worked by
A solution of sodium chloride in water has a vapor pressure of 20.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
If 2.30 grams of rust were allowed to react with aluminum metal, aluminum oxide would be formed. what mass of aluminum oxide would be generated from this reaction
When a particular metal is illuminated with photons, one electron is observed for each absorbed photon. What effect would decreasing the wavelength and number of photons, have on the electrons leaving the surface. Please show all work.
About how much phenacetin will remain dissolved when the water calculated (94ml) is cooled to room temperature
A careless student, Will Bobble, misread the label on a bottle of 10 M sodium hydroxide and used it (rather than 1 M NaOH) to dissolve his vanillin. Then he stored the solution and left the lab early to catch a ride home. During the next lab perio..
biacetyl the flavoring that makes margarine taste just like butter is extremely stable at room temperature but at
if you have 5l of a 10m solution and wish to make 100 mls of 0.01m how many mls of 10m solution would you use and how
The standard enthalpy of reaction, DH°rxn for C2H2(g) + 2 H2(g) ® C2H6(g) is -311.5 kJ mol-1. Determine the value of DE°rxn for this reaction
You believe your unknown compound is acetanilide that melts at 114-115 degrees, so you ask your professor for a sample of the pure compound to do a mixed melting point. You do the experiment and determine the mixed melting point is 106-110 degrees..
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