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What volume of 0.450M MgSO4 x 7H2O (magnesium sulfate heptahydrate) is needed to react with HPO4^2- in 8.25 grams of fertilizer?
How many grams of this acid will be required to titrate 45.0 mL of 0.18 M NaOH solution? H2C2O4 + 2NaOH > 2 Na^+ + C2O4^-2 + 2 H2O
what is the pressure exerted onto the closed end of an apparatus if the atmospheric pressure is 720 torr and the height
Acetylene gas (ethyne; HC?CH) burns in an oxyacetylene torch to produce carbon dioxide and water vapor, and the heat needed to weld metals. The heat of reaction for the combustion of acetylene is -1259 kJ/mol. (a) Calculate the C?C bond energy, and..
At a particular temperature , 35.0% of ClO2 molecules have speeds exceeding 400 m/s. If ClO2 is decomposed to Cl2 and O2 and the resulting mixture is cooled until the original temperature of the ClO2 is reached
Ammonia rapidly reacts with Hydrogen Chloride, making ammonium chloride. Calculate the number of grams of excess reactant when 3.80g of NH3 reacts with 4.20g of HCl
Given the DNA template strand 3'GCATTCAAG5' write the amino acid sequence in the N terminal to the C terminal direction. Use the three letter amino acid abbreviations.
A variety of different products could be formed in this reaction; for this problem assume all unique products are formed that only 1 Br is present in each alkyl halide product. how many of the potential alkyl halide products would have at least on..
Camphor (C10H16O) melts at 178.4 degrees C and has Kf=37.7 K/m. A sample of unknown substance that weighs .840g lowers the freezing point of 25g of camphor to 170.8 degrees C. What is the molar mass of unknown substance
What is the subshell corresponding to the following sets of quantum numbers. An example of a subshell is 2s. A) n=3,l=2 b) n=3, l=1
Element Z has two naturally occurring isotopes Z-79 ( 78.918 amu) and Z-81 (80.916 amu) . Calculate the atomic mass of element Z given the abundance of the Z-81 is 49.31 %
A mass of 1.50 g H2O is sealed in an evacuated 3.0-L flask and heated to 55 °C. What mass of liquid water remains in the flask when equilibrium is established? The equilibrium vapor pressure of water at 55 °C is 118 mm Hg.
A 202 mL benzene solution containing 2.27g of an organic polymer has an osmotic pressure of 8.63 mmHg at 21 degrees Celsius. Calculate the molar mass of the polymer
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