Questions asked
13. Three resonance contributors are drawn below. a. (8 pts.) Draw the resonance hybrid.
Homework 1: Conversion of Units 1. GN-z11 is the most distant galaxy we have observed, its distance from us is 9.8 Giga parsecs (Giga = 109). The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System. If 1 pc = 3.26 light years (ly), and 1 ly = 9.45x1015 m. a) How far is GN-z11 in ly? 9.8 x 10 10°% 3.26 Light years 31.95 b) How far is GN-z11 in km? pe >(301.93x1024)÷1000 31.95 x 10º Light yours 9.45 x 1015 | Km 1000 X 10931.95 Billion => 3.019 x 1023 km Light years 2. The size of protons have been measured to be about 1 fm. A femtometer (symbol: fm) is 10-15 meters. Compare the distance to GN- z11 (above) to the size of a proton. HINT: First convert the two measurements to the same units and then take the ratio between the two. I am looking for an answer telling me only the order of magnitude difference (powers of ten). 3. You use about 3 x 108 kg (m/s)2 of energy every day. How much is that in kWh (kilowatt hour)? HINT: look at the lecture slides for help but show the process to get to the answer.
attention-deficit/hyperactivity disorder means having deficits in social interaction and communication skills true or false
The direction monetary policy will take is determined by: the board of governors
4 George has a large cake to share between him and 7 friends. The large cake has a mass of 32 pounds. Read Out Loud How many pounds of cake will George and each friend get to eat? A. 6 pounds B. 4 pounds Each person leaves behind 0.5 pounds of cake. How many ounces of cake were left behind? ounces(s) 1 \[ 2 \] 3 4 5 8 9 0 \( x \)
Compare and contrast the major points of the Obama and Biden space policies against one of the other president's space policies.
41. Linear combination Let u = 2i + j, v = i + j, and w = i - j. Find scalars a and b such that u = av + bw. 42. Linear combination Let u = i - 2j, v = 2i + 3j, and w = i + j. Write
1. Answer all parts: The following questions (i) - (v) refer to the Scheme below. The formation of compounds C to F are all based mechanistically on migration to electron deficient nitrogen. HN NH2OH B A H C Et Me NaN3 Et Me -NH2 Ph CI Xylene Ph D MeOC ? (Pho)2PN3 E MeOC CO?H 80 °C MeOH OH O Base NH2 OH Br-N NH OH i) Write structure for A and give the reagent and conditions B [4 marks] Suggest a mechanism for the formation of C from A. Comment on any apparent selectivity. [3 marks] (iii) Suggest a mechanism for the formation of D [4 marks] (iv) Draw a structure for the product E and suggest a mechanism for its formation [6 marks] (v) Provide a mechanism for the formation F [4 marks] (vi) Quinuclidine reacts 63 times faster with Mel than does triethylamine (NEt3). Draw the products from these reactions and give an explanation for the difference in reactivity. [4 marks] Quinuclidine
17. The following integral can be evaluated without the use of antiderivatives, by using properties of integrals and formulas from elementary geometry: $\int_0^5 (7 - \frac{x}{5} - 2\sqrt{25 - x^2}) dx$. Show your work using the indicated method and evaluate the integral.
A population has a mean µ = 157 and a standard deviation ? = 24. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 58. The mean is $\mu_{\bar{x}} = \boxed{\text{ }}$ , and the standard deviation is $\sigma_{\bar{x}} = \boxed{\text{ }}$. (Round to three decimal places as needed.)
