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A Pitot tube is placed in a supersonic flow where the freestream temperature is 90°K and the Mach number is 2.5. A normal shock forms in front of the probe. The probe indicates a stagnation pressure of 52 ×103 P a. If the stagnation temperature is 270°K, find the pressure, density, stagnation pressure and velocity of the flow upstream of the shock.
The reactant concentration in a first-order reaction was 6.70×10-2 after 25.0 and 3.30×10-3 after 100 . What is the rate constant for this reaction?
When one mole of each of the following liquids is burned, which will produce the most heat energy. a. C5H12 b. C6H14 c. C6H10O d. C6H12O e. C6H14O
What is the density of glass in g/cm3 if a sample weighing 27.78g has a volume of 11.36cm3
Explain what happens to the atomic number of a nucleus when positron emission occurs
The pH of a certain solution is 3.0. How many H+(aq) ions are there in 1.0 L of the solution
what is meant by hydrogenation? please answer in a simple and easy to
The standard enthalpy of reaction, DH°rxn for C2H2(g) + 2 H2(g) ® C2H6(g) is -311.5 kJ mol-1. Determine the value of DE°rxn for this reaction
What is the white precipitate that forms while the reaction mixture is heated. The reaction is the hydrolysis of the ester Butyl benzoate yields products 1-butanol and benzoic acid.
consider the hypothetical elements x y and z with the following lewis formulas. x with seven electron dots around it y
One molecular form of elemental sulfur is a ring of eight sulfur is a ring of eight sulfur atoms. As one molecule of this element is burned to make sulfur trioxide, how many oxygen molecules are used?
Problem- What is the pH of 75.0 mL of a solution that is 0.047 M in weak base and 0.053 M in the conjugate weak acid (Ka = 7.2 × 10-8)? pH = ?
A 20L vessel is filled with 1.00 mol of ammonia. NH3. What percent of ammonia dissociates to the elements if equilibrium is reached at 345C
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