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The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.60×105 ft^3 of helium. If the gas is at 25deg C and 1.0 atm, what mass of helium is in the blimp?
Aspirin has a pKa of 3.5 and is neutral in its protonated form (i.e. HA). Acetaminophen has a pKa of 9.5 and is also neutral in its protonated form. Predict the elution order of the two compounds in capillary electrophoresis.
What is the gas pressure (in atm) inside a 1.69-L bulb that contains 0.9-g of Ne at a temperature of 34.1 C? Be sure to report the units as atm.
How many kJ of energy are required to convert 747 grams of water (liquid) at 23.4°C to steam at 100°C? The following information is given for H2O:
Using this equation, determine how many moles are formed for every one mole of KIO3. KIO3 + 5I + 6H ? 3I2 + 3H2O + K B)Using this equation, determine how many moles S2O3 are needed to titrate the number of moles of I2 calculated in A.
A particular voltaic cell operates on the reaction below, giving an emf of 0.865 V. Calculate the maximum electrical work generated when 20.0 g of zinc metal is consumed. Zn(s) + CI2(g) ? Zn2+(aq) + 2 Cl ?(aq)
What are some ways to induce recrystallization (Name 3), if your solute refuses to recrystallize after performing the required 7 steps?
how many grams of CaCl2 are needed to make 638.2 grams of a solution that is 28.5% (m/m) calcium chloride in water
What product would you expect to make? Propose a detailed reaction mechanism for this reaction. What by-products might be expected in this experiment?
If you didn't have a computer or data system available, how would you measure the area of the peak. After all, someone's DUI may hinge on this measurement, and you may have to defend your calculation in court
When 10.0 g of NH3 reacts, the actual yield of N2 is 8.50 g. What is the percent yield?
Decribe how to prepare 2.0 liters of a .20 M NaOH solution from 50%. (w/w) Naoh solution that has a density of 1.53 g/mL, and doing all measurements by volume, not mass.
A 0.5 M solution of hydrogen sulfide (H2S) contains 0.15 M nickel chloride NiCl2, and 0.35 M mercury nitrate Hg(NO3)2. The pH of this solution is made very acidic through the use of HCl so that all ions are in solution
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