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At the top of a building the barometric pressure reads 730 mm Hg, at the bottom of the building the barometric pressure reds 755 mm Hg. considering density of mercury to be 13600 kg/m^3, and density of air to be 1.18 kg/m^3 determine the height of the building.
The steam reforming of methane is widely used in industry to make hydrogen, as given in the following reaction:CH4(g) + H2O(g) ? CO(g) + 3H2(g) a) Calculate the (approximate) enthalpy change
The value of ΔE for a certain change is 1325 J. During the change, the system releases 873 J of heat.How much work, expressed in joules, was involved?
Upon combustion, a mole of hydrocarbon formed eight moles of CO2 and eight moles of H2O. Determine the molecular formula of the hydrocarbon and give the blanced combustion reaction.
Calculate the concentration of ALL species in a 0.25 M solution of ethylammonium chloride (EtNH4Cl). The Kb value for the weak base ethylamine (EtNH2) is 5.6 x 10
A 45.0g sample of an alloy was heated to 90.0C and then droped into a beaker containing 82.0g of water at 23.5C. The temperature of the water rose to a final 26.2C. What is the specific heat of the alloy
How many grams of Hcl will be produced from the reaction of 50.0mL of a 0.300M CaCl2 according to the reaction:CaCl2 + H3PO4(aq) ----> Ca3(PO4)2 (s) + HCl (aq)
The standard state of sulfur is solid rhombic sulfur. Use the appropriate standard heats of formation given in Appendix II in the textbook to find the average bond energy of the S=0 in SO2.
Using the same sample of gas ( P1= 695 , T2 = 27 ), we wish to change the pressure to 6950 with no accompanying change in volume or amount of gas. What temperature T2, in Celsius, is needed to reach this pressure
A gas mixture composed of helium and argon has density of 0.670 g/L at 755 mmHg and 298K. What is the composition of the mixture by mass
If a sample containing 2.11 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
Write a chemical equation for Ca(OH)_2 (aq) showing how it is an acid or a base according to the Arrhenius definition.
unit cell problem of copper cu is a face-centered cube that has an edge lenth of 3.62 a note 1a110-10 m. determine the
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