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Batteries are listed by their "cranking power", which is the amountof current that the battery can produce for 30 seconds. A typicalvalue is 450 A. How many coulombs flow through the battery inexactly 30 seconds? If this is a lead storage battery, how muchlead (Pb) is consumed in exactly 30 seconds?
You dissolve 17.9 g of aluminum bromide in a volumetric flask and add H2O to a total volume of 250 ml. What is the formal molarity. What is the molarity of Al cations. What is the molarity of Br anions.
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change.
A chemist has isolated a new natural product and determined its molecular formula to be C24H40O4. In hydrogenation experiments the chemist found that each mole of the natural product reacted with two moles of H2. How many rings are present in the ..
carbon monoxide and water vapor each at 200. torr were introduced into a 250. ml container. when the mixture reached
Compare the pH of an H2CO3 buffer (the first buffer) that contains 0.10 M H2CO3 and 0.10 M NaHCO3 with another H2CO3 buffer (the second buffer) that contains 0.15 M H2CO3 and 0.050. M NaCO3 Carbonic acid has a Ka of 4.3X 10^-7
For 100 g mol of a gas mixture of 75 mol % CH4 and 25% H2, calculate the total heat of combustion of the mixture at 298 K and 101.32 kPa, assuming that combustion is complete.
Label each of the following reactions as exothermic or endothermic ("exo" or "endo"), and according to whether work is done on or by the system, or no work is done at all ("on", "by" or "none")
A student heated a 4.901 g sample of hydrated iron chloride. After heating, the anhydrous iron chloride has a mass of 3.010 g. Calculate the percentage by mass of water in the hydrated compound.
Evaluate the efficiency for a compression ratio of 10:1. Assume that, in state A, V = 4.00 dm3, p = 1.00 atm, andT = 300 K, that VA = 10VB , pc /pb = 5, and that Cpm = 7/2 R
2 K + Cl2 ---> 2 KCl How many grams of KCl is produced from 2.50 g of K and excess Cl2. From 1.00 g of Cl2 and excess K?
silver consists of two major isotopes with the following percent abundances and atomic masses 107ag 51.84 and 106.90509
What is the resulting pH 2)More strong base is added until the equivalence point is reached. What is the pH of this solution at the equivalence point if the total volume is 64.0mL
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