2017年3月6日 · P(X>5) = 0.8 The standard notation is to use a lower case letter to represent an actual event, and an upper case letter for the Random Variable used to measure the probability of the event occurring. Thus the correct table would be: And then; P(X>5) = P(X=6 or X=7 or X=8 ) " " = P(X=6)+P(X=7)+P(X=8 ) " " = 0.2+0.1+0.5 " " = 0.8 Alternatively: P(X>5) = 1-P(X <= 5) " " = 1-P(X=4 or X=5) " " = 1 ...

2018年3月2日 · The value of Ksp for silver carbonate, Ag2CO3, is 8.10×10−12. Calculate the solubility of Ag2CO3 in grams per liter?

2014年8月9日 · The equation that relates wavelength, frequency, and speed of light is c = lambda*nu c = 3.00xx10^8 "m/s" (the speed of light in a vacuum) lambda = wavelength in meters nu = frequency in Hertz (Hz) or 1/"s" or "s"^(-1)". So basically the wavelength times the frequency of an electromagnetic wave equals the speed of light. FYI, lambda is the Greek letter lambda , and nu is the Greek letter nu ...

You can approximate #ln x# by approximating #int_1^x 1/t dt# using Riemann sums with the trapezoidal rule or better with Simpson's rule. Explanation: For example, to approximate #ln(7)# , split the interval #[1, 7]# into a number of strips of equal width, and sum the areas of the trapezoids with vertices:

2014年8月22日 · You calculate the energy of a photon, and then you use the total energy to calculate the number of photons. To calculate the energy of a photon, see How do you calculate the energy of a photon of electromagnetic radiation?. Then Number of photons = "Total energy"/"Energy of one photon" Few instructors will make the question so simple. Instead, they might disguise it as follows. EXAMPLE A ...

2016年8月4日 · #("0.450 mol")/("1 L") xx "0.200 L" = "0.09 mol"# To obtain the mass of solute, we will need to the molar mass of NaOH, which is 40.00 g/mol: Finally, multiply the number of moles by 40.00 g/mol #0.09 cancel"mol" xx (40.00g)/(1cancel"mol")# #=3.60g# Boom, you have a …

2016年4月28日 · I get 371^@ "C". Let's look at what we have: k_1 = 4.60xx10^(-4) "s"^(-1) at T_1 = 350^@ "C", the rate constant for the reaction at temperature 1 k_2 = 8.80xx10^(-4) "s"^(-1) at T_2 = ?, the rate constant for the same reaction at temperature 2 E_a = "104 kJ/mol" THE ARRHENIUS EQUATION RELATES RATE CONSTANTS TO TEMPERATURE AND THE ACTIVATION ENERGY These are related via the Arrhenius equation ...

2016年11月3日 · Part- A PbI_2(soln) ionises in its solution as follows PbI_2("soln")rightleftharpoonsPb^"2+" +2I^- If the concentration of PbI_2 in its saturated solution is xM then concentration of Pb^"2+" will be xM and concemtration of I^- will be 2xM. So K_"sp"=[Pb^"2+"][I^"-"]^2 =>1.4xx10^-8=x*(2x)^2 =>x^3=1.4/4xx10^-8=3.5xx10^-9 =>x=1.518xx10^-3 So the concentrattion of I^- ion in solution is 2x=3 ...

2016年12月3日 · The linear approximation of f at a is L(x) = f(a) + f'(a)(x-a). This is one way of writing the equation of the line tangent to the graph of f at (a,f(a)) The function we want to approximate is f(x) = sqrtx. We want to estimate f(8.95) = sqrt 8.95 so we need a value for a that is close to 8.95 and for which we can find f(a). We can readily find f(1) or f(4), but f(5) would be more challenging ...

Molarity is the concentration of x moles of solute in 1 L of solution. Solutions with varied molarities have different properties i.e., a low molarity acid and high molarity acid can react differently and at different speeds.