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which ions in water make it 'hard'? is it possible to test for only one of these ions quantitatively in the presence of the other.
Consider 25.0 g of water at 21.7°C that are mixed with 25.0 g of water at 43.3°C in a foam cup calorimeter. The equilibrium temperature reached was 30.4°C. Calculate the calorimeter constant in J/°C.
Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the free energy change for this reaction at 37.0 °C (310 K). ?G°\' for the reaction is 29.7 kJ/mol. Assume that the reaction occur..
You have 250.0 mL of 4.00 M sugar solution. You add 319.7 mL of water to this solution. Determine the concentration of the sugar solution after the water has been added.
HCl according to the following chemical equation? MnO2+4(HCl) --> MnCl2 + Cl2 + 2(H2O)
A 355 m-L container holds .146 g of Ne and an unknown amount of Ar at 35 degrees C and a total pressure of 626 mmHg. Calculate the moles of Ar present.
How many moles of O2 are needed to consume 0.52 mol of Mg in the following unbalanced reaction? Mg plus O2 -> MgO
15 g of steam at 373 K is added to 250 g of H2O (liquid) at 298K at onstant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate changes in entropy for the process.
Thermal equilibrium, 10.0g of Fe(s) at 98.0 degrees Celsius is placed in 50.0mL of H2O(l) at 20 degrees Celsius
How many grams of sodium fluoride should be added to prepare the buffer solution? Neglect the small volume chane that occurs when the sodium fluoride is added.
How many grams of methane CH4 must be combusted to heat 1.15 kg of water from 24.0 C to 93.0 C, assuming H2O as a product and 100% efficiency in heat transfer?
How many electrons are transferred in the following oxidation-reduction reaction?
What do the density/potential plots demonstrate about bond order?
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