formula for C3H6? 1) CH 2) CH2 3) CH3 4) CH6 Which represents both an empirical and a molecular formula? 1) P2O5 2) N2O4 3) C3H6 4) C6H12O6 The number of atoms in 2 grams of calcium is equal to 1) 2 × 6.02 × 1023 40 2) 40 × 6.02 × 1023 2 3) 6.02 × 1023 2 × 40 4) 2 × 40 × 6.02 × 1023 8. At STP‚ 32 grams of O2 would occupy the same volume as 1) 64 g of H2 2) 32 g of SO2 3) 8.0 g of CH4 4) 4.0 g of He 9. Which compound has the empirical formula CH2 O? 1) CH3OH 2) CH3CH2OH
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2-(4-isobutylphenyl)propanoic acid‚ making it an organic compound in the class of propionic acid derivatives. Its melting point is 74 - 77° C. It is a stable white crystalline powder‚ slightly soluble in water and very soluble in ethanol. Its formula is also written (CH3)2CHCH2C6H4CH(CH3)COOH‚ which lays out the chemical structure of ibuprofen. Ibuprofen is a chiral molecule‚ meaning that two mirror-image forms (called enantiomers) are possible. In the diagram‚ the wavy line represents
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(II): H1 NMR: δ2.61 (s‚CH3‚3H)‚2.49(s‚CH3‚3H)‚6.40- 7.97 (m‚pyH‚7H )‚ 9.98(s‚ OH.IH)‚ 11.29ppm (s‚ NH‚ 1H). IR (KBr): 3480(OH‚ water)‚ 3227(ph O-H)‚ 1585(C=N)‚ 3349(N-H)‚ 1666 (C=O)‚ 554(M-O)‚ 436 cm-1 (M-N).RAPPTH-Cu (II): H1 NMR: δ2.73 (s‚CH3 ‚3H)‚2.50 (s‚CH3‚ 3H)‚ 6.42- 7.95(m‚pyH‚7H)‚ 10.14 (s‚OH.IH)‚ 11.30ppm (s‚NH‚1H). IR (KBr): 3420(OH‚ water)‚ 3230(ph O-H)‚ 1609(C=N)‚ 3352(N-H)‚ 1662 (C=O)‚ 639(M-O)‚ 492 cm-1 (M-N). RAPPTH-Mn (II): IR (KBr): 3430(OH‚ water)‚ 3232(ph O-H)‚ 1596(C=N)‚ 3347(N-H)
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solution is used. CH3COOH CH3 COO - + H+ CH3COONa CH3COO - + Na+ Buffers are divided into 2 parts on the basis of their nature. Acidic Buffer Basic Buffer The most common buffers are Acetate buffer‚ Phosphate buffer‚ Citrate Buffer and Tris-HCl. The Limit up to which buffer can resist changes in pH is called Buffer Capacity. Apparatus 100ml beaker Digital balance Stirrer Scientific Calculator Chemicals Sodium Acetate Acetic Acid Chemical Equation CH3COOH CH3 COO - + H+ CH3COONa
Free PH Buffer solution Acid dissociation constant
Chemistry 1. Explain why 0-nitrophenol has a lower boiling point than p-nitrophenol? 2. Why alkali metals used in photoelectric cells? 3. Due to which compound‚ ozone depletion is caused in Antarctica? 4. Which of the element among B‚ Al‚ C and Si :- a. Has the highest first ionization enthalpy? b. Has the most negative electron gain enthalpy? 5. c. Write the atomic number of the element present in the third period and seventeenth group of the periodic table
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then transferred to a pre- weighed clean conical vial. Product’s mass was then calculated based on acquired results. Table of Physical Constants Compound | Structural Formula | Molecular Weight (g/mol) | Density (g/ml) | 2-methyl-2-butanol | (CH3)2C(OH)CH2CH3 | 88.15 | 0.815 | Hydrochloric Acid |
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Carbohydrates‚ lipids and proteins 3.2.1 Distinguish between organic and inorganic compounds (2). Distinguish means to give the differences between two or more different items. Organic compounds are based on carbon and are found in living things. There are a number of exceptions including hydrogen carbonate (HCO3- )‚ carbon dioxide (CO2 )and Carbon monoxide (CO). Inorganic compounds are by default all the molecules other than those in the category above. Identify amino acids‚ glucose
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Managerial Accounting (MA) บัญชีบริหาร เป็นการจัดทำและนำเสนอข้อมูลและสารสนเทศทางการเงินที่เป็นอยู่ใ นปัจจุบันแก่ผู้บริหารและพนักงานภายในองค์กร ความสำคัญของบัญชีบริหาร MA เป็นเครื่องมือหนึ่งที่สำคัญในการบริหาร เนื่องจากเป็นสิ่งที่มีบทบาทในการสนับสนุนหน้าที่หลักของการบริ หารทั้ง 4 ที่มีวัตถุประสงค์เพื่อบรรลุเป้าหมายขององค์กร โดยช่วยปรับลักษณะเชิงพรรณนาของกลยุทธ์ให้อยู่ในรูปเชิงปริมาณท ี่สามารถปฏิบัติงานได้จริง หน้าที่หลักของการบริหารองค์กร กระบวนการของ MA บทบาทของ MA ที่ช่วยสนับสนุนหน้าที่
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Introduction: Yellow fever is an acute viral hemorrhagic disease transmitted to humans and other vertebrate hosts by the bite of infected mosquitoes. The name “Yellow” is explained by jaundice that affect some patients with symptoms’ like yellow skin and yellow eyes(http://www.who.int/csr/disease/yellowfev/en/) The YF virus is the causative agent for Yellow fever and it belongs to the virus family Flaviviridae. Single stranded RNA (11kb) present in Flavi viruses .YF virus responsible for number
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is able to withstand more heat than LDPE. However HPDE and LDPE has lower average melting temperatures of 139.5°C and 103.6°C respectively than average melting temperature of PP(178.4°C) is due to the fact that the monomer of PP(C3H6) has one more -CH2 than the monomer of PE(C2H4). Hence PP has a bigger molecular size than that of both LDPE and HDPE and more heat energy is required to overcome the intermolecular forces between PP molecules than that of LDPE and HDPE. Nylon has the highest average
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