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Calculate the amount of heat required to completely sublime 73.0 g of solid dry ice (CO2 ) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
High temperature and low pressure low temperature and high pressure none of the above unless a catalyst is present If it's endothermic, it's high temp and low pressure, but does having an exothermic reaction change that?
when .65 moles of iron metal react with 40.0 mL of a 2.5 M copper (II)chloride solution to produce copper metal and iron (III) chloride. How many moles of copper will be produced?
The decomposition of N2O5 in CCL4 is a first order reaction. If 2.56 mg of N2O5 is present initially and 2.50 mg is present after 4.26 minutes at 55 degrees Celsius what is the value of the rate constant K?
Calculating Annuity Values Bilbo Baggins wants to save money to meet three objectives. First, he would like to be able to retire 30 years from now with retirement income of $20,000 per month for 20 years, with the first payment received 30 years and ..
How many milliliters of a 0.20 M glucose C6H12O6 solution are needed to provide a total of 25.0 g of glucose?
Analyze the problem scenario that you have chosen, and organize your analysis into sections that correlate to each step in the selected problem solving strategy.
Now if your lab partner needed 7.030 x 1019 molecules of Sodium cyanide (NaCN), how many milligrams would you need to weigh out?
A gas weighing 33.62 g occupies a 10.00 liter flask at 27oc and 730 torr of pressure. what is the molar mass of the gas?
Consider the titration of 46.0 mL of 1.2 M NaOH with 1.0 M HCl. Find the pH at the following points. A)After the addition of a large excess of acid
Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings.
Na3PO4 + 3AgNO3 = Ag3PO4 + 3NaNO3 How many moles of AgNO3 would be required to react with 2.0 mol of Na3PO4.
A 21.496 g sample of magnesium is burned in air to form magnesium oxide and magnesium nitride. when the products are treated with water, 2.813 g of gaseous ammonia are generated.
The bromocresolgreen end point of the titration was reached after the addition of 30.00mL of hydrochloric acid solution. Calculate the concentration of the acid solution
What fraction of the spherical atomic volume is occupied by the nucleus? What fraction of this atom's mass is contributed by its nucleus?
Calculate the entropy change associated with the isothermal expansion of 5.40 mol of ideal gas atoms
What mass of solid sodium formate (of MW 68.01)must be added to 115 mL of 0.57 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 4.16? Ka = 0.00018 for HCOOH.
When 4.220 g of calcium hydroxide is reacted with a 30.0 mL of a 0.200 M sulfuric acid solution how many grams of calcium sulfate and water are formed?
Calculating the rate of disappearance of HCl, The rate of disappearance of HCl was measured for the following reaction
A total of 0.155 of this subunit was dissolved in enough water to produce 2.00 of solution. At 28 the osmotic pressure produced by the solution was 0.138 . What is the molar mass of the protein?
The mercury in a 0.7325 gram unknown sample was precipitated with excess par aperiodic acid, H6IO5, according to the following balanced chemical equation:
A 2.50 g sample of an unknown gas occupies 885 mL at 697 mm Hg and 40 C. What is the molar mass of the unknown gas
Identify the limiting reagent for the given combination of reactants. Calculate how many grams of whatever substance will be in excess and how many grams of HF will be made.
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