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A tidal bore is moving upstream into a river of depth 1 m, and constant width, and the bore raises the water level by 1 m. The river is flowing downstream at a steady velocity of 2 m/s.
(i) Find the velocity of the bore relative to a stationary observer.
(ii) Find the velocity of the water downstream of the bore relative to a stationary observer.
What mass of helium gas is needed to pressurize a 120.0 L tank to 264 atm at 25°C?
explain why in the sample calculations 0.1 g of the unknown produced a greater freezing point depression than the same
A copper cylinder, 12.0 cm in radius, is 44.0 cm long. If the density of copper is 8.90 g/cm3, calculate the mass in grams of the cylinder. (assume pi=3.14)
consider the halide ions as nucleophiles. briefly explain why f- the strongest base among the halide ions is the best
a piece of metal with a mass of 151 g is placed in a 50 ml graduated cylinder. the water level rises from 20. ml to 35
1. if a chemical cold pack weighing 28grams and at a temperature of -2c was left in a 25c room for 3 days what would be
Question- In an experiment on identifying cations using paper chromatography, the cation that most strongly absorbs on the stationary phase. Shows a color spot near the top of the chromatography paper after completion of the rise of the solution t..
Solid soduim reacts violently with water producing heat hydrogen and sodium hydroxide. How many moeclues of hydrogen gas are formed when 48.7 g of sodium are added to water.
A sample of hydrated Barium Chloride, BCl2 x H2O weighed 428.3mg before and 356.2mg after heating as BaCl2. What is the average number of water of hydration per molecules of BaCl2?(what is the X in BaCl2 X H20?
When 50.0 grams of metal at 75.0 °C is added to 100. grams of water at 15.0 °C, the temperature of the water rises to 18.3 °C. Assume that no heat is lost to the surroundings.
Calculate the Keq for this reaction at 25°C. - Does this reaction move forward (from left to right) or backward under standard state conditions? Explain your answer in one sentence.
Calculate the pH and the concentrations of all species present H3O+, F-, HF, Cl-, OH- in a solution that contains 0.10 M HF Ka = 3.5*10^-4 and 0.10 M HCl.
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