Questions asked
A solution was placed in a 0.50 cm cuvette. Its absorbance was measured to be A = 0.84 at 230 nm. Calculate the concentration of the solution if the molar absorptivity of the compound at 230 nm is 14 mol–1 dm3 cm–1.
1.6 kg of Methane is expanded polytropically with n=1.5. The initial pressure is 100 kPa and the temperature is 498 K. If the final temperature is 303 how much work is done by the system on the surroundings? Answer in kJ to 2 decimal places.
What is the theoretical limit of detection for the enrichment procedure?
According to the Principle of Increasing Opportunity Cost, in expanding the production of any good, we should start by utilizing the resources that we have the least of.
Find the exact value of the trigonometric function at the given real number.\\ (a) $\sin(\frac{\pi}{4})$\\ (b) $\sin(\frac{3\pi}{4})$\\ (c) $\sin(\frac{7\pi}{4})$
Demand is inelastic when the absolute value of the price elasticity of demand is... 0. greater than 1. less than 1. equal to 1.
even though a person is confused its good to ask him to make decisions about what to wear or what to eat because it forces the person to think true or false
2. Which of the following power series must be used as the nonhomogeneous part for the given initial value problem $\begin{cases} y'' - y' + 3y = \frac{1}{7 + x} \\ y(-2) = -1 \text{ and } y'(-2) = 0 \end{cases}$ in order to obtain the solution by power series solution method? $\text{A) } \sum_{n=0}^{8} \frac{(-1)^n (x - 2)^n}{5^{n+1}}$ $\text{B) } \sum_{n=0}^{8} \frac{(-1)^n (x - 2)^n}{(n+1) 5^n}$ $\text{C) } \sum_{n=0}^{8} \frac{(-1)^n (x + 2)^n}{5^{n+1}}$ $\text{D) } \sum_{n=0}^{8} \frac{(-1)^n (x + 2)^n}{5^n}$ $\text{E) } \sum_{n=0}^{8} \frac{(-1)^n x^n}{5^n}$
1. Two sides of a triangle are \( 16 \mathrm{~cm} \) and \( 20 \mathrm{~cm} \). And their including angle is 120: Draws a rough Pigure of this. Find the altitude of the \( 20 \mathrm{~cm} \) long side. Find the area of the triangle. Also find its third side.
About 79% of all female heart transplant patients will survive for at least 3 years. Eighty female heart transplant patients are randomly selected. What is the probability that the sample proportion surviving for at least 3 years will be less than 76%? Assume the sampling distribution of sample proportions is a normal distribution. The mean of the sample proportion is equal to the population proportion and the standard deviation is equal to $\sqrt{\frac{pq}{n}}$. The probability that the sample proportion surviving for at least 3 years will be less than 70% is (Round to four decimal places as needed.)