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What NaCl concentration results when 299 mL of a 0.820 M NaCl solution is mixed with 407 mL of a 0.450 M NaCl solution?
:When heated, KClO3 decomposes into KCl and O2.
2KCLO_3 ---->2KCl +3O_2
If this reaction produced 91.5 g of KCl, how much O2 was produced (in grams)?
What technology or combination of technologies would you recommend for treating the following contaminated air streams?
What is the formula that relates the temperature change obsereved in a substance with the energy released or abosrbed? when you measure a temperature rise during a chemical reaction, is the reaction endothermic or exothermic?
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q. Is Q larger or smaller than the Ksp? Is the solution unsaturated, saturated, or supersaturated?..
at 900K the following reaction has kp=.345: 2SO2(g)+O2(g)-->2SO3(g) Partial pressures of SO2 is .150 and of O2 is .455. What is the equilibrium partial pressure of SO3?
Determine the number of grams of O2 consumed.
The enthalpy of formation of ethanol, C2H5OH, is -277.o kJ/mol at 298.15K. Calculate the enthalpy of combustion of one mole of ethanol, assuming that the products are CO2 and H2O
Assume that 0.406 mol Carbon (g) is placed in a cylinder that is expanding. The barometric pressure on the outside of the cylinder is constant at 1.00 atm and the temperature is 300.0 K.
How many grams of ethylene glycol would be needed to prevent 4kg of water from freezing above -5.0 degress C
Calculate the molar mass of a Nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees C when 4.27g of the substance is dissolved in the water.
A mass of 48.5 g of a certain substance can be dissolved in 29.1 cm3 of water at 20 Degree Celius. Calculate the solubility of this substance per gram of water at the same temperature.
A solution of water (1.86) and glucose freezes at 3.95. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 .
A 44 sample of water absorbs 329 of heat If the water was initially at 21.7, what is its final temperature.
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