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What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear? given 90.5KJ/mol
Calculate the counts s-1 which should be observed by a detector of 2 cm2 area placed 300 cm from a sample of l2 containing 2 millicuries of 128l.
the partial pressure of oxygen in the atomsphere is 0.20 atm, what is the solubility of dissovled oxygen in blood? recall that the soulibilty of oxygen constant
When a sample of oxalic acid (H2C2O4), which is a diprotic acid, is titrated with 0.250 M potassium hydroxide solution, 24.44 mL of the potassium hydroxide solution are required to neutralize the acid. How many grams of oxalic acid where present i..
I am trying to understand the effects of leachate from landfills and its effects on groundwater, and since I am in environmental health- its effects on the human health.
what volume of 0.366M Ni(NO3)2 is required to completely react with 55.8 ml of 0.500M Na2CO3.
What difference in titrant volume would you except between the end- point and the equivalence point if the only indicator available was diphenylamine sulfuric acid
What was the calculated PH value obtained for the reaction NH3 + HCl -› NH4Cl using the thermodynamic data NaOH (aq) + HCl (aq)--> H2O(l) +NaCl (aq) NaOH (aq) + NH4Cl(aq)---> NH3 + NaCl + H2O(l) NH4Cl 2M 20ml NH4OH 2M 10ml HCL 2M 20ml NaOH 2M 20ml
The diameter of a neutral helium atom is about 168 pm. Suppose we could line up helium atoms side by side in contact with one anohter. Approximately how many atoms would it take to make the distance 1 cm from end to end.
What is the density of a sample of ammonia (NH3) gas in a 4.32 L flask at a pressure of 641 torr and a temperature of 37.0oC?
Phases are optional. A. 0.450 L of 0.420 M H2SO4 is mixed with 0.400 L of 0.200 M KOH. What concentration of sulfuric acid remains after neutralization?
A gas sample containing 1.65 mol at 25°C exerts a pressure of 413 torr. Some gas is added to the same container, and the temperature is increased to 50.°C.
Draw and completely label a flow chart for this system, In a process for concentrating 1000kg of freshly extracted orange juice containing 12.5 wt% solids, the juice is strained, yielding 800kg of strained juice and 200kg of pulpy juice.
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