Questions asked by seol
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The work function for mercury is equivalent to 435kJ/mol photons. What is the kinetic energy, in joules, of the ejected electrons when light of 188 nm strikes a mercury surface?
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Determine the wavelength, in nanometers, of the line in the Balmer series corresponding to n_2 = 5?
Express your answer using five significant figures.
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Find the following for function f(x)=\ln(x^4+1)...?
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Show that the equation \sin(x)-6x=0 has exactly one root...?
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What is the velocity of an electron that makes a transition corresponding to the longest wavelength line of the Lyman series?
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How much energy, in joules, must be absorbed if all the O_3 molecules in the sample of air are to dissociate?
Assume that each photon absorbed causes one O_3 molecule to dissociate, and that the wavelength of the radiation is 254 nm.
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Find the dimensions that will minimize the cost of the material?
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Two hydrogen atoms interact to form a hydrogen molecule. Classify the following statements that describe the stages of bond formation in a hydrogen molecule according to the predominant force existing between the two hydrogen atoms...?
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A solar cell that is 15% efficient in converting solar to electric energy produces an energy flow of 1.00 kW/\text(m)^2 when exposed to full sunlight. The cell has an area of 30.0 \text(cm)^2.
(a) What is the power output of the cell, in watts?
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Consider the function f(x)=e^(-x^(2))?
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Solve the following (limit; L'Hospital's Rule)?
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L'Hospital's Rule question: Find \lim_{t\rightarrow\infty}v(t)?
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If Newton's Method is used to locate a root of the equation f(x)=0 and the initial approximation is x_1=2, find the second approximation x_2?
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(full question below) "How much water would you expect to vaporize, assuming no water splashes out?"
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What is the molecular orbital diagram for C_2^-?
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Determine a region whose area is equal to the given limit?
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Express the integral as a limit of Riemann sums?
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Evaluate the indefinite integral \int(x^2-1)/(x^3-3x+1)dx using substitution?
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Starting with "1.20 g" of A, what is the mass of A remaining undecomposed after "1.00 h"?
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What is the initial partial pressure, in mmHg, of N2O5(g)?
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Measles pathogenesis curve by function f (see details for questions)?
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What mass of benzoic acid, C_6H_5COOH, would you dissolve in 400.0 mL of water to produce a solution with a pH = 2.95?
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In a 0.70 M solution of benzoic acid, what percentage of the molecules are ionized (CHEMISTRY 1B problem)?
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What is the pH of a solution in which 1\times10^(-7) moles of the strong acid, HCl is added to one liter of water?
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For a solution that is 0.285 M HC_3H_5O_2 (propionic acid, K_a=1.3×10−5) and 0.0888 M HI, calculate the following?
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How many millimoles of strong acid or strong base can be added to the solution before any significant change in pH occurs?
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A beaker with 1.50 xx 10^2"mL" of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.00 mL of a 0.360 M HCl solution to the beaker?
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Compute pH before/after addition of NaOH?
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Determine the molar solubility of PbCl_2 in 0.16 M HCl(aq)?
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What is the solubility of MnS, in grams per liter, in a buffer solution that is 0.105 M CH_3COOH - 0.490 M NaCH_3COO?
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At what approximate temperature will an equimolar mixture of N_2(g) and O_2(g) be 3.0 % converted to NO(g)?
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What is the total pressure of the gases in the flask at this point?
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Part A
What must be the temperature if the following reaction has ΔG0= -44.0 kJ , ΔH0=-24.8 kJ, and ΔS0=15.2 JK−1?
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Which of the following processes shows a decrease in entropy of the system?
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Consider the following reaction; use the information here to determine the value of \DeltaS_(surr) at 398 K ... Will this reaction be spontaneous at this temperature?
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Calculate the \DeltaG°_(rxn) using the following information?
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Determine whether the series converge or diverge?
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What is the cell potential for the reaction Mg(s)+Fe^(2+)(aq)\rarrMg^(2+)(aq)+Fe(s)
at 47 °C when [Fe^(2+)]= 3.50 M and [Mg^(2+)]= 0.110 M?
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The following cell is operated as an electrolytic cell, using a current of 0.480 A . The volume of each solution is 100.0 mL. Electrolysis is stopped after 10.00 h , and the cell is allowed to function as a voltaic cell. What is E_(cell) at this point?
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Which samples result in a sample mean that overestimates the population mean...?
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(dy)/(dx) = 3x^2(1+y^2)^(3/2)?
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Why are lower and upper fences important?
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How many license plates can be made consisting of 2 letters followed by 3 digits (using the fundamental counting principle to solve)?
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Probability questions?
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What is the probability that in three consecutive rolls of two fair dice, a person gets a total of 7, followed by a total of 11, followed by a total of 7?
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A sample of 4 different calculators is randomly selected from a group containing 16 that are defective and 30 that have no defects; what is the probability that at least one of the calculators is defective?
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y^{'''}-3y^{''}+2y^'=\frac{e^{2x}}{1+e^x}?
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"Compute the probability of x successes in the n independent trials of the experiment" ?
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Identify which type of sampling is used?
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Construct a frequency polygon using six classes and a class width of 3?
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Determine whether a census is practical in the situation described?
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"The graph of a normal curve is given. Use the graph to identify the values of \mu and \sigma" ?
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What proportion of the numbers
are between 0 and 0.2 (normal distribution)?
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Probability with samples?
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Experimental/observational studies & relative frequencies?
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Mean/median/mode and range/standard deviation/variance (sample)?
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Explain using the concept of a confidence interval (population proportion)?
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Data missing for question? :\
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Express the confidence interval using the indicated format?
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Interpret the interval?
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Use the given information to find the minimum sample size required to estimate an unknown population mean \mu?
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Monohybrid Crosses (Mendelian Inheritance) question?
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Define the following in relations to each other?
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\int_0^1e^x/(1+e^(2x))dx=?
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\int\sinh^2(x)\cosh(x)dx?
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\intx(2x+5)^8dx?
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\int_t^5(dt)/((t-4)^2)?
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Find the number b such that the line y=b divides the region...?
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Find the values of c such that the area...?
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Find the volume of the solid via cross-sections?
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\int_(0)^(15)x^2\sqrt(a^2-x^2)dx?
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Find the exact length of the curve?
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Cylindrical shells (parts in details)?
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Solve \int(x^3/\sqrt(1-x^2))dx using two methods?
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Solve (5 questions)?
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English prompt question?
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A series of integral based questions?
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\int_0^\inftye^(-ax)\cos(bx)dx?
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\int(x^3+x)/(x-1)dx?
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\int1/(x-b)dx?
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\sum_(n=1)^\inftyn/(n^4+1)?
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Does the series a_n=(1+n)^(1/n) converge or diverge?
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\lim_(n\rarr\infty)(1-4/n)^n: convergent or divergent?
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Is the following series 6-2+2/3-2/9+2/27-2/81 convergent or divergent?
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What is the general solution of the differential equation y-xy'=3-2x^2y'?
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What is the general solution of the differential equation y'-1/xy=2x^2\lnx?
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Find the values of x for which the following series is convergent?
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Series and sequences?
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Derivation and application of reduction formula?
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Evaluate I=\int\cos^4(x)dx?
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Evaluate I=\int\sec^3(x)dx?
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\int(x^2dx)/(\sqrt(4-9x^2))?
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\intx^3\sqrt(1-x^2)dx?
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\int1/(x^2+a^2)dx?
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Partial fractions \int5/((x^2+2x+2)(x-1))?
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LaTeX/MathJax: How to format in biography and/or comments?
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\int5/((x^2+2x+2)(x-1))dx?
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Approximate \int_0^2(1)/(1+x^3)dx using the Midpoint Rule, given n=4?
Please check my work
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Approximate \int_0^2 1/(1+x^3)dx using Trapezoid Rule?
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I don't understand this explanation for \sum_(n=0)^\infty((-1)^n)/(5n-1)? Why test for convergence/divergence AGAIN, if the Limit Comparison Test
confirms that both series are the same?
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