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What is the enthalpy change (DH), in kJ, when 14.80 g of hydrogen gas is combusted completely in presence of oxygen gas to produce water?
An aqueous sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution at 20°C has a density of 1.3294 g/mL. Calculate (a) the molarity, (b) the molality, (c) the percent by mass,
Tarzan does not know that the vine has a breaking strength of 1.0 x 10^3 N. What is the largest mass Tarzan can have and make it safetly across the river?
When a 2.00-g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 1.083 kJ·K-1, the temperature decreases by 0.460 K. Calculate the molar heat of solution
A 89 gram solution of silver nitrate contains 14 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
If 10,000 L of air were bubbled through an acidic iodide solution (at STP) and was then back titrated with 19.4 mL of a 1.2x10-4 M Na2S2O3 solution to reach equivalence, what is the concentration o
Precisely 2.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.10 m/s^2, how much time passes before the police car overtakes the speed
4NH3 5O2 → 4NO 6H2O 1.85g NH3 react with 3.39g O2. How many g NO & H2O form? How many g of excess reactant remain after limiting reactant used ?
A cannon at the top of a 176 m high cliff fires at a pirate ship. The cannonball has an initial velocity of 149 m/s at 68° above horizontal. Ignore air resistance. At what angle (positive angle
The herbicide level in the soil in a corn field was measured at 3.0 ppb. How many micrograms (ug) of herbicide are present in 10 lb of soil?
A 1.80-L flask is filled with propane gas (C3H8), at 1.00 atm and -19.4°C. What is the mass of the propane in the flask?
A horse canters away from its trainer in a straight line, moving 110 m away in 19.0 s. It then turns abruptly and gallops halfway back in 4.2 s. Calculate its average velocity for the entire trip, u
Develop a suitable rate expression for product formation [v=K5(ES)2 by using i)the rapid equilibrium approach ii)the quasi - steady- state approach.
A rectangular block of plastic, measuring 1.79 cm by 1.73 cm by 2.29 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 4.80 cm3. Assuming the d
What are the products of saponification of glyceryl trilaurate?
A 97 gram solution of silver nitrate contains 10 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
A lead ball is dropped into a lake from a diving board 6.50 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the wat
A car traveling at 120 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m. What was the average acceleration of the driver during the collis
What would be the density of a hypothetical form of ZnS that is face---centered cubic with octahedral, instead of tetrahedral, coordination geometry?
A 6.50 x 10^-5 M solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15-cm cell at a wavelength of 525 nm. Calculate the absorbance of this solution.
A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 41.0, and the distance betwee
What are some factors that affect the formation of the semi-carbozole derivative of n-butyraldehyde ? (e.g. hinderance, temperature?)
A 29.19-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 50.0 mL. The solid and tolu
How do you experimentally determine the freezing point constant for water? (Which is later found to be 1.86 degrees Celsius/molality of the solute)
A cylinder of oxygen gas contains 26.4 g of O2. Another cylinder, twice the volume of the cylinder containing Assuming ideal behavior. what is the mass of the carbon dioxide?