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My courses 20203 الفرع الرئيسي العلو كيمياء عامة )1( نظري - طولكرم General hemistry 101 Exam کيمياء عامة )1( نظري Match each of the following with its correct answer The following reaction is : CH,OH ) + 3/2 O, → CO, + 2H,0 + 726.4 kJ 2(g) (1) Choosm. Choose... directly endothermic exothermic inversely Based on Charles law, the volume occupies by any sample of gas at a constant pressure Is .......... proportional to the absolute temperature Choose... Based on Grahams law, the rate of effusion of the gas is proportional to the square root of the molar mass Choose...

Not y Given the following reaction: AH° = -118.7 kwatk CHAG)+ 02g) → C(s) + 2H20 2° ) E FI AH° = - 26.4 kcàl 1 C(s) + O 2(g) → CO (), AH° = – 67.7 kcal CO(g) + 2 → CO 2(g) O 20) Consider the combustion of meth ane, determine the AH° using Hess's Law. ΔΗ- CHAG) + 202(g) → CO2G) + 2H20» → CO 2(g) + 2H20u)

PAP Chemistry-2903012-42100P-1/ Le Chatelier's Principle/ Lesson 128 2. Zinc (Zn) granules react slowly with dilute hydrochloric acid (HCI), but much faster if the acid is concentrated. Zn(s) 2HCI(aq)ZnCl2(aq) + H2(g) Zinc + Hydrochloric Acid Zinc Chloride + Hydrogen What causes the reaction to proceed faster with concentrated acid? The concentrated hydrochloric acid causes more hydrogen gas to be produced. The pressure of hydrogen gas molecules increases as concentration increases. The concentrated hydrochloric acid molecules move faster than in dilute acid. There are more collisions between the zinc and concentrated hydrochloric acid. PREVIOU

C-D I4 EI Imagine you are a farm owner who lives close to a small town. Just over 30% of the town's population is over the age of 65, thus you are concerned about the potential effects of pesticide drift from your farm. What is 1 strategy that you (the concerned farmer) could use to prevent pesticide drift from occurring? * lili 日

What are the present Functional Groups in the drug molecule below. Show complete solution with appropriate labels. Thanks!

Complete each of the following chemical reactions.

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MENH2 (1) Et MENH2 (2) Et

The following Statin is called Pravastatin. It is used to help lower high levels of LDL-C in patients with Familial Hypercholesterolemia (FH). USE DIFFERENT COLORS FOR FOLLOWING QUESTIONS! Circle the Pharmacophore. Box the Functional groups.

Of the following solvents indicate whether they are polar or non-polar, whether they are donors, acceptors or do not form hydrogen bridges according to the dielectric constant data shown.1. Pyridine - ε 12.40 2. ethyl ether - ε 4.343. Ethanol - ε 24.554. Hexane - ε 1.885. Acetone - ε 20.70

ब OTos OIT OTOS बंद ८ बो L→ ont I i NH 2 Provide synthetic patthway

Directions: A list of organic compounds is given on the 1st column. Check the boxes of qualitative test of which you think the compound will give a POSITIVE RESULT.

Draw a tiny section of a molecule of amylopectin. Include 4 monomers. If there are any branch points in the molecule, be sure you include at least one. Some starter molecules have been pre-loaded into the drawing area to save you time. You can edit these, or use the copy/paste tool to make copies. Be sure to delete any starter molecules you don't use before you submit your final answer. HO–CH. H K H OH H HO ÓH OH H NH HS Save For Later Submit Assinamas

A (C₂H100) oxidation + CrO3/H₂SO4 B (CgH₂O) + 2,4-DNPH - - Tollen NaOl C (C7H5O₂Na) + CHI3 HCI D (C7H6O₂) Solubilty + NaOH + NaHCC

1. MgBr (xs), CH3CH₂OCH₂CH3 2. HCI, H₂O

The highlighted part of this antimalarial is an.... A) Alcohol CH3 H B) Ester H3C» C) Ether "CH3 D) Ketone E) None of the above

With the information provided answer #2

the analysis of a mixture of hydrocarbon cracking products, all of which are able to be distilled, but distillation is unable to separate them cleanly. A. a pharmaceutical product containing 2 stereoisomers of the active ingredient, both of which are fairly polar, aromatic, water soluble, and decompose rather than boil. B. C. The separation of a mixture of water-soluble globular proteins of various sizes. The analysis of a mixture of reactor gases that includes methane, hydrogen, carbon dioxide, carbon monoxide, and nitrogen. D.

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Table 1. Physical Properties of Selected Compounds Density (g/mL) Melting point (°C) Boiling point (°C) Substance Acetanilide 1.22 114 304 Acetone 0.79 -95 56 Benzophenone Bromoform 1.15 48 306 150 2.89 0.98 0.79 2.46 8 -2.4 2,3-Butanedione t-Butyl alcohol Cadmium nitrate 4H;O Chloroform Cyclohexane p-Dibromobenzene p-Dichlorobenzene Diphenyl Diphenylamine Diphenylnethane Ether, ethyl propyl 88 83 25 59 132 1.49 0.78 1.83 -63.5 6.5 86.9 61 81.4 219 1.46 53 70 53 27 174 0.99 255 1.16 302 265 1.00 1.37 -79 64 Hexane 0.66 69 Isopropyl alcohol Lauric acid 0.79 0.88 1.63 -98 83 225 330 43 Magnesium nitrate 6H2O Methyl alcohol Methylene chloride Naphthalene a-Naphthol Phenyl benzoate Propionaldehyde Sodium acetate 3H2O Stearic acid Thymol Toluene p-Toluidine Zinc chloride 89 79 1.34 -98 -97 65 40.1 1.15 1.10 80 218 94 288 1.23 71 314 0.81 1.45 0.85 0.97 -81 58 48.8 123 70 291 232 52 0.87 0.97 2.91 -95 111 45 200 283 732 MAR ...

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c) the following are the active ingredients of some of over the counter pain relievers (analyzed by TLC In Lab 9). For each circle the different functional group and name the functional groups (hint is given to help you with the number of functional group) CH3 H3C HO ÓH ČH3 acetaminophen ibuprofen caffeine aspirin 4 functional group 4 functional group 3- functional group 3-functional group

Use the following image All compounds belong to the  alcohol or ester family because they contain a  hydroxyl or carboxyl functional group?

The following figure shows a typical phospholipid. Suppose this molecule was incorporated into a cell membrane. Which letter indicates the portion of the molecule that would be exposed to the aqueous environment?

Intramolecular H-bonding (IHB) are interactions that occur within one single molecule. IHB is also known as chelation, since it involves ring formation. Which of the following is (are) stabilized by IHB? * QH Çi OH -NO2 (a) Cl-Ç–Ç–H (b) či ÓH OH (с) CH, —С—СH—С—ОС,Н, CH,OH (d) | CH,OH D B A

1) R2NH, H,- H20 B. Cycloheptanone 2) ELHC=CHCOEt 3) H30* 1) КОН 2) PhHC-CHCOOME C. EtCOCH2NO2 3) Н:О +

Can i get help with these problems number 5