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If an automobile travels 235 mi with a gas mileage of 21.5 mi/gal, how many kilograms of CO2 are produced? Assume that the gasoline is composed of octane, C8H18, whose density is 0.69 g/mL.
If 9.00 of CaCl2 (Cl two)is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of solution Delta H solution of CaCl2 (Cl two)is -82.8 KJ/Mol.
Combustion analysis of 0.395 g sample of unknown compound produces 1.072 g CO2 and 0.307 g H2O. Analysis also indicates the presence the presence of 0.068 g N in the sample.
The extract and the insoluble residue both heated to dryness, could you determine the amounts of NaCl ,NH4Cl ,and SiO2 originally present? Why or why not?
The density of liquid oxygen at its boiling point is 1.14, and its heat of vaporization is 213. How much energy in joules would be absorbed by 2.0 of liquid oxygen as it vaporized?
125g of sodium oxide and carbon dioxide gas. if the reaction occurs at 784 torr and 32.5 C. What volume of carbon dioxide gas is produced?
How many kilojoules of heat are absorbed when 7.20g of MgO(s) is decomposed into Mg(s) and O2 (g) at constant pressure?
you purchase a cup of coffee, but, at 98.4 degrees C, it is too hot. You add 45.5 g of ice that is -2.2 degrees C to the 248ml of coffee. What is the final temperature of the coffee? (assume the hea
What is the vapor pressure depression of a solution of 135 g of CaCl2 in 225 g of water? Use molar masses with at least as many significant figures as the data give.
The term vapor pressure almost always means the equilibrium vapor pressure. What pysical arrangement is needed to measure vapor pressure?
Translate the following word equations into balanced chemical equations and explain how the equations represent what happens in grid spaces a and g.
Water and 8.00 mol/L potassium nitrate solution are mixed to produce 700 mL of a solution with a concentration of 6.00 mol/L. What volumes of water and potassium nitrate solution are used?
A 1004.0 g sample of calcium carbonate that is 95% pure gives 225 L of carbon dioxide at STP when reacted with an excess of hydrochloric acid. What is the density in g/L of the carbon dioxide?
What is the freezing point in Celsius of a solution prepared by dissolving 6.20 g of MgCl2 in 110 g of water? The value of Kf for water is 1.86 (C*kg)/mol), and the van't Hoff factor for MgCl2 is i
A sample of hydrogen was collected over water at 23oC and an atmospheric pressure of 735 mmHg. What is the pressure of the hydrogen gas collected in a 568 mL container?
A balloon filled with 27.3 mol helium has a volume of 612. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 33.0°C as it expands to a volume of 686. L, the pres
Calculate the ΔH for the reaction above using the data provided. (Hint: you need to calculate q rxn then convert it into kJ/mole)
What mass of water would you need to evaporate from your skin in order to dissipate 1.7 x 10^5 J of heat from your body? H2O(l) -> H2O(g) delta H vaporation = 40.7 KJ/mol.
The gas pressure measured at 20.0 degrees C is 1.95 atm. Assuming ideal gas behavior, how many grams of ammonia are in the flask?
Sulfuric acid reacts with aluminum hydroxide by double replacement. Determine the mass of each product formed. Assume 100% yield.
Solution contains FeCl3 = 0.015 M and NaOH = 0.010 M. Solution of FeCl3(aq) + 3NaOH(aq) -> Fe(OH)3(S) + 3NaCl(aq) gives precipitate Fe(OH)3. Qsp = [Fe3+] [OH]^3 = 1.5 * 10^-8 and Ksp of Fe(OH)3 = 1
How many grams of magnesium chloride could be formed from the rraction of 6.82 grams of magnesium with excess HCl?
In a reaction 82.00 g of sodium reacts with 74.00g of ferric oxide to form sodium oxide and iron metal. calculate the mass of solid iron produced.
Calculate the molarity of a solution of acetic acid made by dissolving 30.00mL of glacial acetic acid at 25 C in enough water to make 300.0mL of solution.
Why was the titration performed by the addition of permanganate solution to oxalate solution and not the other way around? Why was the experiment performed at an elevated temperature?