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What concentration of aqueous NH3 is necessary to just start precipitation of Mn(OH)2 from a 0.020 M MnSO4? Kb for ammonia 1.8 x 10^-5, Ksp for Mn(OH)2 4.6 x 10^-16.
the molar heat of combustion of methanol, CH3OH, is -757kJ/mol. If 2g of methanol is placed in bomb calorimeter with heat capacity of 6.5 kJ/c, what is the temperature rise when the sample is combusted?
what amount of heat would need to be added to 5.0 x 103 g of water to change its temperature from 21c to 84c?
Elements in the first short period are limited by the octect rule whereas those in the higher period can expand their valence shells. Describe what this means, account for this phenomenon and give an example of each.
An acre of corn can produce about 375 gallons of ethanol, using only the kernel of the corn for conversion to ethanol. Assume the energy input to produce an acre of corn is 15000000 kJ.
The equilibrium constant Kc for the decomposition of phosgene, COCl2, is 4.63 10-3 at 527°C. COCl2(g) CO(g) + Cl2(g) Calculate the equilibrium partial pressure of all the components
the final temperature of the cu? I tried to use Q=MS(delta)T and solve for the tinal temp instead of the change in temp but kept getting 45°c.
The following reaction was carried out in a 2.50L reaction vessel at 1100 K: C(s)+H2O(g)?CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 5.25mol of C
a gas sample containing 1.50 mol at 25 exerts a pressure of 400 torr. some gas is added to the same container and the temperature increased to 50 C. If the pressure increases to 800. torr, how man moles of gas were added to the container? assume a..
Explain the physical interactions of the molecules that lead to proteins falling out of solution in high salt. What is the driving force of protein precipitation?
The molarity (moles/L = M) of a solution of 4.0 g NaOH in a total volume of 100.0 mL (or 40 g in 1.0 L) is what?
Determine if the following reactions will form a precipitate when mixed. If one is formed, write the BALANCED formula unit, the COMPLETE IONIC, and NET IONIC equations. If a precipitate doesn't form, write NR for no reaction
A hot-air dryer is used to reduce the moisture content of 1500kg/min of wet wood pulp from 0.75 kg H2O/kg dry pulp to 0.15wt% H2O. Air is drawn from the atomosphere at 28C, 760mm Hg, and 50% relative humidity, sent through a blower-heater, and the..
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