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The temperature of a black body can be estimated based on the wavelength of light that it is emitting. A star can be considered a black body. Find the surface temperature of a star where λmax = 609 nm
the mass natural abundance of the isotopes h and d are 99.985 and 0.015 respectively. the mass natural abundance of
the standard recipe used in an exercise uses 3.0 ml of 0.25 phenanthroline solution in 100 ml of final solution to
In the course of pumping up a bicycle tire, a liter of air at atmospheric pressure is compressed adiabatically to a pressure of 7 atm. (Air is mostly diatomic nitrogen and oxygen.) What is the final volume of this air after compression?
What intermolecular force holds together the 2 strands of DNA - What intermolecular force important for the secondary structure of proteins?
The blank solution used to calibrate the spectrophotometer is 10.0mL of 0.2M Fe(NO3)3 diluted to 25.0mL with 0.1M HNO3. Why is this solution preferred to simply using de-ionized water for the calibration
Choose the correct expression for Keq and description (homogeneous or heterogeneous) for the following reaction: 2 PbO(s) + 2 SO2(g) 2 PbS(s) + 3 O2(g)
A car's catalytic converter combines carbon monoxide, a poisonous gas, with oxygen to form carbon dioxide gas. A balanced equation indicates the mole ratios of reactants and products.
Calculate the formula for each of the following halogen compounds to five or more significant figures
A 20mL volume of previously boiled, deionized water is added to the conical flask to prepare the sample for titration. Explain why this volume is not critical to the analysis.
What is the maximum mass in grams of aluminum chloride that could be obtained from 2.50 mol of barium chloride and excess aluminum sulfate?
In some jurisdictions, forensic chemists will testify based on data obtained only from presumptive tests. What are your views on this practice?
Calculate the change in entropy when 54 ml of hot (95 C) water is added to 90 ml of cold (5 C) water is a closed cup, given that Cp (H2O, l) = 75.5 J/molK
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