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Consider a random mixture containing particles of Na2SO4 and K2SO4. There are 5.32 g of Na2SO4 (density 2.639 g/mL) and 94.68 g of K2SO4 (density 2.456 g/mL) in the mixture. All particles in the mixture have a uniform spherical radius of 0.094 mm. a) Calculate the mass of a single particle of Na2SO4 and the number of Na2SO4 particles in the mixture.
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.50 mL Ti solution of unknown concentration with 2.00 mL of a 10.5 micrograms/mL solution of Co
Calculate the molecular weight of sulfur if 35.5 grams of sulfur dissolve in 100.0 grams of CS2 to produce a solution that has a boiling point of 49.49 oC.
10 g of methane (CH4) is combusted in a calorimeter that has an empty heat capacity of 18 J/°C. The calorimeter contained 150 g of water.
What is the minimum frequency of light necessary to emit electrons from sodium via the photoelectric effect? What is the wavelength of this light?
If the initial pressure of the ether is 135 torr, what is its partial pressure after 1420 s? (Note, since the volume and temperature don't change, the pressure is directly related to number of moles and so the pressure can be treated similar to co..
Dry the hydrate as instructed in the lab procedure, noting down it's mass until it appears to no longer decrease (no more water bound in the sample).
What is the flow rate, m3, of the gasoline and kerosene stream coming off the first column? 2 - What is the composition of m7, the heating oil and lubricating oil stream coming off the second column?
What is the technique for securing a piece of filter paper into a Buchner funnel for vaccum filtration? c) The alum crystals are washed of contaminants with an alcohol-water mixture rather than with deionized water. Explain.
A voltaic cell consists of Pb/Pb2+a half-cell and a Cu/Cu2+ half-cell at 25 . The initial concentrations of and are 5.10×10?2 and 1.60 , respectively. What are the concentrations of Pb2+ and Cu2+ when the cell potential falls to 0.360 V?
orbitals in the HCl molecule, taking ?= -1.0 eV and the ionization of energy of atomic chlorine as 13.1 eV.
Calculate the concentration of the ions and the molar solubility and the solubility product constant for the Salt at 25 degree c. Show the balance reaction.
Carbon-14 is a radioactive nucleus with a half-life of 5760 years. Living matter exchanges carbon with its surrounding (for example, through CO2) so that a constant level of 14C is maintained, corresponding to 15.3 decay events per minute
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