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Most mixtures of hydrogen gas with oxygen gas are explosive. However, a mixture that contains less than 3.0% O2 is not. If enough O2 is added to a cylinder of H2 at 33.2 atm to bring the total pressure to 34.5 atm, is the mixture explosive?
A 2.9 m solution of methanol (CH3OH) in water has a density of 0.984 g/ml. What are the a) mass percent, b) molarity, and c) mole fraction of methanol in this solution?
a company tries to reduce all lead-times by 50 percent. there is a discussion concerning the impact of this change. as
You can also get an incorrect percent yield of over 100%. Many chemical reactions of course occur in aqueous solutions.
A Sprinter set a high school record in track and field, running 200.0 m in 21.4s. What is the average speed of the sprinter in kilometers per hour? Express your answer numerically in kilometers per hour.
A 1.00 L buffer solution is .250 M in HF and .250 M in LiF. Calculate the pH of the solution after the addition of .15 moles of solid HI. Assume no volume change. Ka for HF at 25C is 3.5x10^-4
The concentrations of Al and K in a sample of riverwater are 0.50 mg/kg and 1.3 mg/kg, respectively. Express the concentration in molality?
Imagine that you place a cork measuring 1.30cm x 5.50cm x 3.00cm in a pan of water and that on top of the cork you place a small cube of lead measuring 1.15cm on each edge. The density of cork is 0.235g/cm3, and the density of lead is 11.35g/cm3.
Predict the relative order of Rf values for the amino acids in the following mixture: Ser, Lys, Leu, Val, and Ala. Assume that the separation was carried out on paper chromatography
The test for Mg uses a selective complexing agent,titan yellow.Unlike many of the other metal species in this experiment which exhibit color due to electronic transitions by d electrons,Mg does not actually have any d electrons. can you suggest wh..
The half-life of carbon-14 is 5730 years. Therefore, 5730 years after being cut from a tree, a piece of wood will have 50.0 % of the carbon-14 that it had originally. What percentage of the original carbon-14 will remain in the wood after another 5..
Consider the titration of 30.0 ml of 0.030 M NH3 with 0.030 M HCl. Calculate the pH after the following volumes of titrant have been added.
Suggest Chemical Reactions that could be used to identify the contents of four unlabeled bottles containing solutions of the following substances: CuSO4, Al2(SO4)3, Pb(NO3)2 and FeSO4
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