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A 40 foot aluminum street lighting support is sized and welded intoposition between two very large bridge beams on a hot summer daywhen temperature of the aluminum support is 145 degrees Fahrenheit.At a winter temperature of -40 degrees Fahrenheit, what is the typeof stress in the support and what is the magnitude of the stresslevel support?
how many grams of methanol (CH3OH) is required to prepare a 0.112 m solution in 440 g of water? answer in units of g.
A baseball weighs 220 g. Top speed for a professional pitcher is about 100 mph when he throws a fast ball. Find the de Broglie wavelength (in nm) associated
What is the freezing point of a solution that contains 23.0g of urea, CO(NH2)2, in 275mL water, H2O. Assume a density of water of 1.00 g/mL
Calculate the change in enthalpy of reaction for two moles of CO(g) reacting with one mole of O2 (g) to form CO2(g). The molar heats of formation for each of these gases are CO -110.5 KJ/mol,
write a report about the chemical equation about the combusiton of butane. the report must include the equation, a brief history about the combustion of butane and its importance to the world and any dangers involved.
A buffer is prepared by adding 1.00 L of 1.0 M HCl to 750 mL of 1.5 M NaHCOO. What is the pH of this buffer? Ka = 1.7 × 10-4
consider radiation of wavelength of 8000 Angestroms, at a temprature of 1000 K. using a planck law, calculate the energy per unit volume
the water at the gas-collecting port is assumed to be 25c but it is actually 15c. how will this error affect the
Methane, CH4, the major component of natural gas burns in air to form CO2 and H2O. What mass of water is formed in the complete combustion of 5.00 ´ 103 g of CH4
at 30 km above the surface of the earth the temperature is about 230. k and the partial pressure of oxygen is about
A river contains 10.5 mg/L of dissolved silica. The measured pH = 6.5 and the water temperature is 25 degrees Celcius. Calculate the concentration of each silica species in solution.
What mass of carbon dioxide is produced from the complete combustion of 7.00×10?3g of methane
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