A stone is dropped into a river
A stone is dropped into a river from a bridge 42.8 m above the water. Another stone is thrown vertically down 1.46 s after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone?
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What is the pH of a solution prepared by mixing 25 mL of 0.10 M methylamine with 25 mL of 0.10 M methylammonium chloride?
The White River in Vermont (USA) has a rectangular channel cross-section with a Manning coefficient is n = 0.040 and the downstream bed slope is S = 5.0 × 10-5. In the summer, the width of the river and the center water depth are, respectively,
if 25.0 milliliters of .2oo molar BrO3- is mixed with 30.0 milliliters of .450-molar Br- solution that contains a large excess of H+, the amount of Br2, formed, according to the equation above, is ??
An acid solution is 0.100 M in HCl and 0.190 M in H2SO4.What volume of a 0.150 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid?
Somewhere in the Alps, a mountain lake discharges into a 8-m wide stream with boulders across the bottom and gravel along its sides, thus having a Manning coefficient n = 0.041.
Silver consists of two major isotopes with the following percent abundances and atomic masses: 107Ag (51.84% and 106.90509 amu) and 109Ag (48.16% and 108.90476 amu). Calculate the average atomic mass of silver to five significant digits.
Assume that the density of all solutions is 1.00 g/mL and the specific heat of the mixed solution is 4.18 J/goC. What is the heat of neutralization of 1 mol of hydrochloric acid?
The heat of hydrogenation of X is less than that of Y. X and Y react with HBr to form a mixture of the same bromoalkanes, and they both undergo hydroboration/oxidation to give a mixture of the same alcohols. What is the structure of Y?
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