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1. A thin-walled plastic cigarette lighter was found to contain 4.2g of butane in an interior volume of 5.12ml. calculate the pressure at 25 C, if the butane had remained as a gas.
2. Comment on the reasonableness of your answer to question #1. (for comparison, a typical medical oxygen tank which is designed to hold about 140 atm pressure on the inside, is made of 12.5 mm thick chrome-steel and weighs about 10 kg.)
3. Assuming ideal gas behavior, calculate the number of times this experiment could be run, using 45ml of butane at 1 atm, from the lighter in question #1.
A solution of ammonia and water contains 1.50×1025 water molecules and 5.50×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
Calculate the mass of silver chloride in grams required to make 4.4g of silver plating.
If Kc is the equilibrium constant for a forward reaction, 2 A? B, what is Kc´ for the reaction 4 A? 2B? A) Kc B) Kc C) 2 Kc D) (Kc)2
Calculate the rate constant at 100 °C. Suggest a reason for the low activation energy for this reaction.
When 1.555g of this compound (molar mass=130.13g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 7.429 degrees celsius. What is the heat capacity (calorimeter constant) of the calorimeter
What is the molarity of the HCl solution if 310mL of the HCl solution reacts with magnesium to produce 5.40L of H2 gas measured at STP
0.65 of sodium hydroxide (NaOH) pellets are dissolved in water to make 2.5L of solution. What is the pH of this solution
one hundred grams of water is saturated with nh4cl at 50degc. according to table g if the temperature is lowered to
Calculate the percent compostion of impure benzoic acid. The orignial weight of benzoic mixture was 4.23 g
An oligomeric protein has a molecular weight of 168000. A 420 mg sample was treated with an excess of 1-fluoro-2,4-dinitrobenzene (Sanger\'s reagent) until the reaction was complete
The period 6 transition metals have greater densities than either the period 4 or 5 transition metals. An explanation concerns the 4f orbitals
Calculate the time needed for the amount of ethane to fall from 1.43 10-3 mol to 2.00 10-4 mol in a 500. mL reaction vessel at 700.°C.
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