02/08/25

Chemistry Kinetics
The reactionH2 (g) + Br2 (g) -> 2HBr (g)is first order in both H2 and Br2, withk=7.61x10^-4 L/mol*sat 291 °C. If 1.00 L of at a concentration of 0.0584 M is rapidly mixed with the same volume of... more
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01/08/24

Calculate the molar heat of fusion of this substance in kJ/mol. 300g of this unknown substance, with a molar mass of 180g/mol, gives off 65 kJ of energy as it freezes.
Honors Chemistry; Molar Enthalpy of Fusion and Vaporization
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12/02/23

What is the reduction potential of a hydrogen electrode that is still at standard pressure, but has pH = 5.25 , relative to the SHE?
The reduction potential for all other half-reactions are measured relative to the half-reaction2H+ (aq) + 2e- H2​(g)Under standard conditions (pH=0.000, PH2 = 1 atm) this standard hydrogen... more
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09/19/23

The 2% of items with the shortest lifespan will last less than how many years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.5 years, and standard deviation of 1.6 years.The 2% of items with the shortest lifespan will last less... more
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09/04/23

Perform the calculation and record the answer with the correct number of significant figures.
Perform the calculation and record the answer with the correct number of significant figures.(34.123+4.20) divided by (98.7654−6.639)=
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09/04/23

Perform the calculation and record the answer with the correct number of significant figures.
Perform the calculation and record the answer with the correct number of significant figures.(6.5−5.91) / 3.83=
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09/01/23

Find x such that P(X ≤ x) = 0.350. (Statistics with a Z Table)
Hi I am looking to find the steps to solve this probability question.Let X be normally distributed with mean μ = 132 and standard deviation σ = 35. [You may find it useful to reference the z... more
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08/31/23

Complete balancing the equation for the oxidation of toluene with potassium permanganate in an acidic medium.
Complete balancing the equation for the oxidation of toluene with potassium permanganate in an acidic medium.(Notes: Use the half-cell method to balance the redox equation. The potassium ion is a... more
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08/10/23

How to solve Concentration problem:
A 50.00 mL solution containing an unknown amount of UO2−4 was passed through a Jones reductor, converting UO2−4− to U3+. Upon exposure to atmospheric oxygen, the U3+ was reoxidized to U4+.U4+. The... more
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06/30/23

If n=20, ¯ x (x-bar)=36, and s=15, construct a confidence interval at a 98% confidence level. Assume the data came from a normally distributed population. Give your answers to one decimal place.
If n=20, ¯x�¯(x-bar)=36, and s=15, construct a confidence interval at a 98% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place.
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06/21/23

The waiting times for commuters on the Red Line during peak rush hours follow a uniform distribution between 0 minutes and 12 minutes.
The waiting times for commuters on the Red Line during peak rush hours follow a uniform distribution between 0 minutes and 12 minutes.Compute the height of the uniform distribution.  Leave your... more
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06/19/23

For the following right-tailed test, given H0 : µ ≤ 135 vs H1 : µ > 135 with n = 39, α = 0.05, s = 10, and = 140. Find the observed power
a. 0.81b. 0.19c. 0.93d. 0.07
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06/19/23

solid-liquid extraction
What is the difference between soxhlet extraction and tea filtration
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02/10/15

The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia.
The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia. One of the chemical compounds produced from the plant was analyzed for a particular collagen. The... more
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