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Describe how you would make 350ml of a 20% Na2CO3 given 500g bottle of anhydrous sodium carbonate (MW = 105.99g/mole).
Show your calculation.
A farmer applies 1700.0 kg of a fertilizer that contains 10.0% of nitrogen to his fields each year. Fifteen (15.0%) percent of the fertilizer washes into a river that runs through the farm.
Calculate the frequency of the light emitted when an electron in a hydrogen atom
Constant pressure molar heat capacity of a compound is found to vary with temp, according to molar cp= 15.25 +.138* T--2.21*10^4/T^2 Calculate the enthalpy change when 1 mole of this compound
The molar volume of a certain form of solid lead is 18cm3/mol. Assuming cubic closest packed structure, determine the following: The volume of a single cell.
A 35.0 mL solution of 0.095 M CaCl2 is mixed with 25.0 mL of 0.0012 M BaCl2 if KF is slowly added which flouride salt will precipitate first. Calculate the concentration remaining in solution of the cation that first precipitates when the second f..
Without referring to the appendix, calculate the quantity (Delta rG - Delta rA) for the following reaction at 298 K: C(s) + CO2(g) --> 2CO(g) Assume ideal gas behavior.
Explain what is the concentration of selenium in ppm in the well water. If necessary, Presume the density of the well water is 1.00 g/ml.
what would happen to the pressure of a confined gas sample if the volume of that sample was decreased while the
Calculate DE, and determine whether the process is endothermic or exothermic for the following cases: q = -142 kJ and w = -530 kJ.
a solution of ethanol c2h5oh in water is prepared by dissolving 63.5 ml of ethanol density 0.79 gcm3 in enough water
write the balanced net ionic equation for the reaction that occurs when 0.1 m solutions of copperii sulfate and calcium
How much ammonia in a lab at 22 degree celcius would be necessary to make 1.0 g of urea if the yield is know to be less than 57%
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