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Suppose you inserted a piece of an unknown metal into a solution of zinc (II) nitrate and observed no reaction. Then if you inserted the unknown piece of the metal into the solution of iron (III) chloride a deposit formed on the bottom of the well in the well plate. Where does the unknown metal fit into the activity series
Imagine that you have a 7.00 litre gas tank and a 3.00 litre gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
Solid iron reacts with chlorine gas to produce iron(III) chloride. If 10.0 grams of iron reacts with excess chlorine gas and 18.5 grams of iron(III) chloride is produced, what is the percent yield of the iron(III) chloride
Calculate the mixing ratio (ppbv) of NO2. Assume T=20 degrees Celsius = 293 K; P = Atmospheric pressure. MW of NO2 = 44g/mol
1.56 g of a gas dissolves in 2.00 L of water at a pressure of 1.75 atm. At what pressure will 2.00 g of the gas dissolve in 2.00 L of water if the temperature remains constant?
What volume in mL of 2.00 M sodium bicarbonate solution is needed to neutralize 25.0 mL of 4.00 M HCl?
Calculate the pH of 0.0021 M aminoethanol (pKa = 9.38) in 0.0030 M sodium aminoethanoate (a salt of the conjugate base of aminoethanol).
How many total moles are produced when 0.69 mol of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon dioxide and water
An unknown mass of each of the given substances 1.Sand (tf=70.4 C),2.Pyrex glass(tf=67.6 C),3.water(tf=55.9 C) ,4.ethanol (tf=45.9 C), initially at 19.0 degrees Celsius, absorbs 1930 Joules of heat. Find out the mass of each substance.
A 1.200 gram sample of C7H6O2 was dissolved in 11.42 grams of lauric acid, and it was determined that the freezing point of the lauric acid was lowered by 1.680 Celcius.
Is imidazole an aromatic compound? Explain. Remember to account for non-bonding electrons on the nitrogen atoms. Which nitrogen atom is more likely to be protonated in an acid solution?
Calculate the Ki for a competitive inhibitor whose concentration is 6.5x10-5M that increases the Km of the substrate
A certain enriched sample of uranium contains 92.000% U-238 and 8.000% U-235. What is the average atomic weight of the uranium atoms in this sample? The isotopic masses of U-235 and U-238 are 235.0439 amu and 238.0508 amu, respectively.
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