How long does it take for 78.5% of a phosphine sample
The decomposition of phosphine, PH3, follows first-order kinetics.
4 PH3(g) => P4(g) + 6 H2(g)
The half-life for the reaction at 550 C is 81.3 seconds. How long does it take for 78.5% of a phosphine sample to decompose?
Expected delivery within 24 Hours
A thin flat plate is installed in a water tunnel as a splitter. The plate is 0.3 m long and 1 m wide. The freestream speed is 1.6 m/s. Laminar boundary layers from on both sides of the plate.
Starting with only the solid, it is found that at 40C the total gas pressure (NH3 and CO2) is 0.33 atm. Calculate the euilibrium constant Kp/
The half-lives were found to be 161 min at 199 degrees celcius and 12.5 min at 230 degrees celcius. Calculate the acivation energy for this reaction.
Provide the chemical reaction of an oxidation-reduction reaction that was observed to be spontaneous.Provide a value for the standard cell voltage for this reaction. Is the voltage a positive value as expected for a spontaneous chemical reaction?
What is the theoretical yield of calcium carbonate if 2.05 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below?
Use polar coordinates to find the volume of the given solid. Below the paraboloid z = 36 - 9x2 - 9y2 and above the xy-plane Use polar coordinates to find the volume of the given solid. Bounded by the paraboloid z = 9 + 2x2 + 2y2 and the plane z = 15
An airplane was moving with a velocity equal to 300mph when the velocity was increased with uniform acceleration to 600mph in 5 min. calculate the number of miles the airplane traveled during that interval of time.
a chemist makes a solution of 1.33 Mol CaCl2 and 800 kg water, and then discovers that the freezing point of the solution is significantly less than 0 c how coudl teh chemist change the solution to increase the freeazing point?
1945924
Questions Asked
3,689
Active Tutors
1445589
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Explain the risks of not reporting the results of your forensic assessment findings accurately. Provide specific examples.
Read "The Effect of Tart Cherry Juice Compared to a Sports Drink and Cycling Exercise Performance, Substrate Metabolism, and Recovery" from University Library
Identify and analyze one resource that provides information regarding services for dealing with and treating substance use and abuse in youth or adolescence.
Discuss how culture may influence one's perceptions. Provide an example of how culture may impact the interaction between a patient/client
Write an essay describing your achievement of a goal and your friends or family member's achievement of a goal using motivational theory
Pets can have a therapeutic effect on people; they seem to have the power to calm the anxious and cheer the depressed. Give three reasons
Review Chapter 12 and consider how your culture has impacted your worldview and personality. Pay particular attention to the section on characteristics of Cult