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One mole of CaCO3(s) is placed in an evacuated cylinder that is fitted with a frictionless piston. It is heated to 800 degrees C at which point it decomposes to CaO(s) and CO2(g). Calculate the work done assuming complete decomposition at 1.00 bar. How much work would be done if there was no piston and the container was open to the atmosphere?
A weak acid (HA) is found to ionize 17.8% when mixed at a concentration of 0.3 mol/L. What is the value of Ka for this acid?
What is the change in the boiling point of the aqueous solution? and water how man moles of ions are present is solution
2Al(s)+2KOH(aq)+6H2)-->2KAl(OH)4(aq)+3H2(g) If you place 2.05 g of aluminum in a beaker with 185 ml of 1.35 M KOH, will any aluminum reamin. What mass of KAl(OH)4 will be produced
Which of these is square planar and which is tetrahedral? State reasons for your choice. b) Rationalize the colors of these complexes in view of your choice.
Zinc and sulfur react to form zinc sulfide by the equation shown below. How many grams of ZnS can be formed when 12.0 g of Zn reacts with 6.50 g of S? (Atomic mass: Zn = 65.38, S = 32.06).
in the second step of the Mond process, the gaseous Ni(CO)4 is isolated and heated to 500 K. the equilibrium constant for the above reaction at 500 K is 1.21 x 10^-4. why is the temperature increased for the second step of the Mond process?
If a saturated solution of NH4NO3 at 70 °C is cooled to 10 °C, how many grams of solute will separate if the quantity of the solvent is 94.0 g?
you need to make a solution of cano32 for a class demonstration. first you measure a quantity of the solid cano32 by
An unknown mass of each of the following substances, initially at 22.0^circ C, absorbs 1950 J of heat. The final temperature is recorded as indicated. Find the mass of each substance. a. Pyrex glass (T_f=55.1^circ C. B.sand (T_f=62.3^circ C). C.et..
Calculate the pH of a solution made by adding 11.0 g of sodium formate, NaHCOO, to 400. mL of 0.65 M formic acid, HCOOH. Hint what kind of solution is made
In a half-life decay process, start with 4.00 mCi of material having a half life of 25 mins. Without any detailed calculations, approximately how many mCi of this isotope would be remaining after 2 hours and 10 mins
for the reaction given below the frequency factor a is 8.7 1012 s-1 and the activation energy is 63 kjmol.nog o3g no2g
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