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Balloons are still used to deploy sensors that monitor meteorological phenomena and the chemistry of the atmosphere. It is possible to investigate some of the technicalities of ballooning by using the perfect gas law. Suppose your balloon has a radius of 2.0 m and that it is spherical.
(a) What mass can the balloon lift at sea level, where the density of air is 1.22 kg m-3?
(b) What would be the payload if He were used instead of H2?
Which of the following changes to a voltaic cell would cause an increase in potential (i.e., more positive Ecell)
Suppose that 0.90g of water condenses on a 80.0g block of iron that is intitially at 24 degrees celsius. If the heat released during condensation goes only to warming the iron block, what is the final temperature (in Celsius) of the iron block.
If a divalent metal ion is inserted in the center of the porphine ring, its charge will exactly balance the two negative charges of the dianion. Write a balanced equation for the reaction of tetraphenylporphyrin (which you can abbreviate as TPP) w..
calculate the weight of sodium hypochlorite, NaOCl.
How many grams of KCl are present in 250.0 mL of a 0.125 M solution? [Use formula weight: KCl, 74.55 g/mol]
(a) What conditions are represented by the abbreviation STP. Temperature °C Pressure atm (b) What is the molar volume of an ideal gas at STP
Find the heat transferred (in kJ) when 5.50 L of ethylene glycol (d = 1.11 g/mL, see Table 6.2 for c) in a car radiator cools from 37.7°C to 23.0°C.
Calculate the amount of heat transferred when 2.5 g of Mg(s) reacts at constant pressure. Express your answer using two significant figures
If you have 15mL of 0.1 M NaC2H3O2, and the pH is 7.0. What would the Kb be for this reacton
What is the solubility of lead(II) chloride in both hot and cold water? why is the use of hot water critical to the sucess of the experiment
explain the difference in boiling point between the isomers 1-chlorobutane and 2-methyl-2-chloropropane in terms of structure.
The activation energy of a certain reaction is 45.4kJ/mol. At 28 degrees celcius, the rate constant is 0.0150s^?1. At what temperature in degrees Celsius would this reaction go twice as fast?
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