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The upper falls in Yosemite National park, at 440 m, is among the 20 highest waterfalls in the world. Estimate the difference between the temperature of the water at the top and bottom of the falls. The molar heat capacity of water (molecular mass 0.018 kg) is 80 J K-1 . The acceleration due to gravity is 9.8 Neglect evaporation and the change in elevation.
A sample of air at 10.0 atm is heated from 575 K to 750 K. If the volume remains constant, what is the final pressure
What is the density of a block of marble that occupies 253 cm and has a mass of 752 g? Answer in units of g/cm
Balance the following redox reactions. Break your answer down into individual steps not just the final balanced numbers. a) P4(s) + NO3^- ==>> H2PO4^- +NO(g) (acidic solution)
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 77°C. Weights are removed suddenly from the piston to give the following sequence of three pressures.
a box contains a mixture of small copper spheres and small lead spheres. the total volume of both metals is measured by
Classify which reaction is single replacement, double replacement, decomposition, combination and combustion. SiO2+HF--->sIf+H2O C7H10N+O2--->CO2+H2O+NO2 KO2+CO2--->K2CO3+O2 C4H10+Cl2+O2--->CO2+CCl4+H2O Ca3p2+hH2O--->Ca(OH)2+PH3
calculate the amount of potassium ferricyanide(formula weight 329.23g/mole) that must be used to prepare 250 mL of a 2.5X10-3 M solution.
Burning something is the combining with oxygen. Hydrocarbons, such as methane, ethane, octane (for automobiles)., combine with oxygen to form carbon dioxide and water. These combustion reactions all release energy and are all exothermic.
Calculate the molarity of a hydrofluoric acid, HF, solution if 50.0 ml of the solution is neutralized by 18.5 mL of 0.400 M NaOH.
When pressure is applied to a liquid, its volume decreases. Assuming that the isothermal compressibility
A particular reactant decomposes with a half-life of 145 s when its initial concentration is 0.310 M. The same reactant decomposes with a half-life
Suppose it was found that in an equilibrium mixture of these gases the partial pressure of NH3(g) is 24.9 atm and the partial pressure of N2 is 6.68 atm. What is the partial pressure of H2(g)?
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