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Consider a string with a length of 54.5 cm tied at both end (like on a stringed instrument). If the frequency of the first harmonic on the string is 256 Hz, determine the speed of the wave in the string. Post your answer in m/sand with 3 significant figures.
600.0 mL of 0.240 M perchloric acid, HClO4(aq) was added to a high quality constant-pressure calorimeter containing 400.0 mL of 0.300 M KOH(aq). Both solutions have a density of 1.000 g mL-1 and a specific heat of 4.184 J g-1°C-1.
The compounds Br2 and ICl have the same number of electrons yet Br2 melts at -7.2 C and ICl melts at 27.2 C
A compound consist of 65.45% C, 5.492% H, and 29.06%O on a mass basis and has a molar mass of 110 g/mol. Determine the molecular formula of the compound
a piece of metal with a mass of 148 g is placed in a 50 ml graduated cylinder. the water level rises from 20. ml to 35
Calculate the standard enthalpy of formation of methane, CH4 (g), using a C-H bond enthaply of 413 kJ mol-1 and the atomization enthalpies of 716.682 and 217.96 kJ mol-1, respectively for C and H.
A 100.0-g sample of copper is heated from 10.0°C to 100.0°C. a) Determine the number of calories needed. (The specific heat of copper is 0.0921 cal/goC).
Explain how alkene/aromatic C-H stretches are distinguished from alkane C-H stretches. Do the C-H stretch peaks in the IR spectra of triphenylmethanol, bromobenzene and benzophenone occur in the expected alkene/aromatic C-H stretching region
Calculate the mass of carbon dioxide produced from 39.4g of octane in this reaction: 2C8H18 + 25O2 to 16CO2 + 18H20
Draw a mechanism to demonstrate how pyridine catalyzes the hydrolysis of acetic anhydride to two molecule of acetic acid. Is this reaction reversible?
Of sublimation, recrystallization, distillation, and extraction, which purifications methods should be used to purify the following: a) a crude solid mixture that is 90% pure
a vertical cylinder contains v moles of an ideal gas and is closed offby a piston of mass m and area a. the
what is the vapor pressure at 25oc of a solution containing 4.00 x 102 g of sucrose c12h22o11 in 5.00 x 102 g of water?
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