Question 2. What should be the molecular ion and the positively charged fragments, which arise from the ionization of: a. 2 -methylpentane b. 2,2-dimethylpropane c. 1-pentene

8. LEGO HN O'H HO ON (6) 0 (s) 6. 7. 6. 5. 4. 1 2 Write the acidic ionization equation for NH,+. Question 25 of 27

Find parametric equations of the line perpendicular to the 𝑦𝑧‑plane passing through the point (−6,6,5).x = ?y = ?z = ?

the book. Here is one for you to work out. The region bounded by the curve y = sin I, the axes, and the line r = is shown below. Determine centroid of this region. Mark it in the diagram. Does your answer seem reasonable, based on the picture? : : - .: : : : : : 11 12 13 14 15 16 o a1 02 03 04 05 06 07 08 09

The table below is from E107 simulated experiment. From the data, what is the experimental value of the heat of fusion of ice? Determining the Latent Heat of Fusion of Ice 125 g Mass of calorimeter, m. Specific Heat of calorimeter Mass of water, my 0.2174 calig 100 g 1.000 cal/gC Specific Heat of Water Ow Mass of mixture (calorimeter, water+ice), mm 2498 Mass of ice, m. 24 g Initial temperature of ice, t, 0°C Initial temperature of calorimeter, 1 50°C Initial temperature of water. 1 50°C Final temperature of mixture, 29.5°C Experimental Latent heat of fusion, L; calg Actual Latent heat of fusion, Ly 79.71 callg Percentage Error O 79.31 calg O 79.71 calg 79.13 calg O 79.8 calg The table below is from E107 simulated experiment. From the data, how much heat is lost by water in the calorimeter? Determining the Latent Heat of Fusion of Ice 125 g 0.2174 cal/gC Mass of calorimeter, m. Specific Heat of calorimeter Mass of water, m Specific Heat of Water or Mass of mixture (calorimeter, water+ice), 7. 100 g 1.000 cal/gC 2498 24 8 Mass of ice, m Initial temperature of ice. I, 0°C Initial temperature of calorimeter, 1. 50°C 50°C Initial temperature of water, I Final temperature of mixture, 29.5°C Experimental Latent heat of fusion, L calg Actual Latent heat of fusion, Ly 79.71 calg Percentage Error O 708 cal O 2050 cal O 2607 cal O 557 cal

2 The following equations were estimated using the data in BWGHT: log(bwght) = 4.66 - .0044 cigs +.0093 log(faminc) + .016 parity (.22) 0.0009) (.0059) (.006) + .027 male + .055 white 0.010) (.013) n = 1.388, R2 = .0472 and = log(bwght) = 4.65 - .0052 cigs +.0110 log(faminc) + .017 parity (.38) (.0010) 0.0085) (.006) + .034 male + .045 white - .0030 motheduc + .0032 fatheduc (.011) (.015) (0030) (.0026) n = 1,191, R2 = .0493. The variables are defined as in Example 4.9, but we have added a dummy variable for whether the child is male and a dummy variable indicating whether the child is classified as white. (i) In the first equation, interpret the coefficient on the variable cigs. In particular, what is the effect on birth weight from smoking 10 more cigarettes per day? (ii) How much more is a white child predicted to weigh than a nonwhite child, holding the other factors in the first equation fixed? Is the difference statistically significant? (iii) Comment on the estimated effect and statistical significance of motheduc. (iv) From the given information, why are you unable to compute the F statistic for joint significance of motheduc and fatheduc? What would you have to do to compute the F statistic? (v) What is the estimated effect on birth weight when smoking 20 cigarettes a day?

use nodal analysis to generate the matrix form of equations GI=I in terms of node voltages V4 3Ω V, T 2Α. 18 V 8Ω 5A 5 Ω