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Calculate the fraction of atom sites that are vacant for silver at 695°C. Assume an energy for vacancy formation of 0.65 eV/atom.
A reaction occurs at a rate of 2.25 *10-2 moles per liter per second at 332 K. Estimate the increase in the rate of a reaction when the temperature increases to 332 K. Express the rate in moles per liter per second.
What is the the mole fraction of a solution prepared by dissolving 0.315 g of cholesterol
Calculate the percentage of chlorine in a sodium hypochlorite powder (disinfectant for pools) if 5.0 kg of powder gives off 2.3 kg of chlorine.
A mixture of FeO and Fe2O3 with a mass of 10.0 g is converted to 7.43 g Fe of pure Fe metal. What are the amounts in grams of FeO and Fe2O3 in the original sample
Hydrogen cyanide is prepared from ammonia (NH3) and natural gas (CH4).2 NH3 (g) + 3 O2 (g) + 2 CH4 (g) → 2 HCN (g) + 6 H2O (g)
When 4 g sample of NH4NO3(s) was dissolved in 60 g of water in a coffee-cup calorimeter, the temperature drops from 296 to 291 K.
the ratio of the no of molecules in the excited state at the temperature of 213 K to the number of ground state molecules and the percent of the excited molecules at 213 K.?
If 72.4 kJ of heat is supplied to a 842 g block of metal, the temperature of the metal increases by 9.0°C. Calculate the specific heat capacity of the metal in J/g·°C.
A 50.0-L stainless steel container was charged with 3.00 atm of hydrogen gas and 4.00 atm of oxygen gas. A spark ignited the mixture, producing water.
Tincture of iodine is I2(s) dissolved in ethanol, C2H2OH. A 1% solution of tincture of iodine is 10.0g of solute for 1000g of solution.
How much heat is required to warm 223 g of ice from -46.3°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
Hydrogen phosphate buffer, Buffer solutions have the unique ability to resist changes in PH when an acid or base is added to them. One important buffer system that helps to maintain blood pH at a constant value of 7.4 is the hydrogen phosphate buf..
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