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Small samples of oxygen gas needed in the laboratory can be generated by any number of simple chemical reactions, such as 2KClO3(s) 2 KCl(s) + 3 O2(g) According to this balanced chemical equation, how many moles of oxygen gas are produced from the reaction of 2 moles of KClO3 solid?
On the basis of your knowledge of bonding in liquids and solids, arrange the following substances in order of highest to lowest melting temperature: NaCl, Na, Cl2, SiO2.
Explain the hazards associated with 1.0 moles of Ch3COOH solution, 0.10 moles of BaCL2 sloution, and 0.10 moles Na2C2O4 solution?
The solubility of silver sulfate in water is 0.223% (w/v) at 35°C. Calculate the solubility product of this salt at this temperature
Consider a sample of calcium carbonate in the form of a cube measuring 2.305in on each edge. If the sample has a density of 2.73cm^3 , how many oxygen atoms does it contain
Estimate the minimum boiling point difference betwen two compounds that would allow effective seprartion of the two compounds by simple distillation.
An 11.0 gram sample of CO2 exerts a pressure of 50.0kPa. What mass of CH4 must be added to the CO2 in order to increase the pressure of 75.0 kPa? Assume no CO2 escapes.
calculate the specific heat of a metallic element if 478 j of energy are needed to raise the temp. of a 82.73 g sample
How many total moles of ions are released when the following sample dissolves completely in water? 7.24x 10^20 formula units of NiCl2.
Why are chromatographic peaks broader than would be expected solely on the basis of the random nature of solute migration
Bessemer converter is used for the manufacture of : Which is the formula of Haematite
The work function for metallic rubidium is 2.09eV. Calculate the kinetic energy and the speed of electrons ejected by light with wavelength of (a) 650 nmand (b) 195nm.
CO(g) + 2H2(g) = CH3OH(g) , what is the equilibrium constant? , where CH3OH = 0.0412 atm, H2 = 0.274 atm, CO = 0.914 atm.
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