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Which of the following elements would you predict to have an anomalous electron configuration? A) Se B) Ce C) Ag D) Sr
A tank at is filled with of sulfur hexafluoride gas and of carbon monoxide gas. You can assume both gases behave as ideal gases under these conditions.
Calculate the standard enthalpy of the reaction, \Delta {{H}^\circ}_{\rm rxn}, for the thermite reaction: \rm 2Al(s) + Fe_2O_3(s) \rightarrow 2Fe(s) + Al_2O_3(s)
What is the pH of a solution prepared by dissolving 11 mmol of a weak base in 350 mL of a 0.199-M solution of its conjugate acid
Determine end value of n in a hydrogen atom if the electron starts in n=4 and atom emits wavelength of 486nm.
what are the freezing point and boiling point of an aqueous solution of 15.5g glucose (c6h12o6) dissolved in 150 g of water?
A dilute electrolyte solution is prepared by dissolving iron(III) chloride in water. It is found to have a freezing point
The mole fraction of oxygen in the atmosphere is .21. If the barometric pressure is 0.975 atm, what is the concentration of oxygen in water? Kh=1.3 x10^-3 M/atm
A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz or SiO2), and iodine.
100g (water) that increases temperature from -100 degrees Celsius to 200 degrees Celsius. How much energy in a Kilo Joule is absorbed?
The Ksp of mag fluoride is 6.4x10 -9degree calculate the solubility (in g/l) of mag fluoride in water
Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.
Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq)
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