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Polonium (Po) is the merely element known to adopt the simple cubic crystal (scc) system. The atomic radius of polonium, found by x-ray diffraction is 167.5 pm. Define what is the density of polonium?
1. the equation for a beers law plot is y 2012.5x 0.003. if the recorded absorbance for an equilibrium mixture is
If adding 0.552g sample of Metal X to 150 ml of 1.0M HCL caused a temperature increase of 7.33 degrees C, calculate the quantity of heat that has flowed.
Hydrochloric acid B) Ammonium Hydroxide 2) Identify the geometry of the iron(III) complex in water and the complex ions produced in the above reactions
When 7.51 grams of propane reacts with excess oxygen how many grams of carbon dioxide are formed
If the final temperature of the combined water is 39.0 degrees C and the heat capacity of the calorimeter is 26.3 J/C, calculate the mass of the water origninally in the calorimeter. Enter your answer in scientific notation.
Iron(II) chloride (melting point 677°C) and potassium chloride (melting point 776°C) form the compounds KFeCl3 and K2FeCl4 at elevated temperatures.
A 4.0L sample of air collected at 298 K and then cooled to 278F while held at constant pressure. What is the new volume of the air
The reaction 2NO(g) + Cl2 (g) --> 2NOCl(g) is carried out in a closed vessel. If the partial pressure of {NO} is decreasing at the rate of 27 torr/min, what is the rate of change of the total pressure of the vessel?
al3 is reduced to als at an electrode. if a current of 2.00 ampere is passed for 48 hours what mass of aluminum is
A 200.0-mL sample of the same tap water required 47.86 mL of the standard EDTA for titration at pH 10 using calmagite indicator. Calculate the molar concentration of Mg2+ in the tap water
During an experiment, a student adds 0.339 g of calcium metal to 100.0 mL of 2.05 M HCl. The student observes a temperature increase of 11.0 °C for the solution.
Concentrated sulfuric acid (almost 100%) H2SO4 has a recognized density of 1.84 grams/cm^3. Based on this, calculate the molarity of this liquid.
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