yield; 0.917g of 2-hydroxybenzoic acid (0.917/138) * 180 138 (the molar mass of 2-hydroxybenzoic acid) 180 (the molar mass of aspirin) Theoretical yield: 1.196g 3 d.p. Percentage yield is worked out by Actual yield of synthesised aspirin: 0.347g 0.347/1.196 * 100= 29 Percentage yield: 29% Melting Points Compound Began Melting (°C) Totally Melted (°C) Range (°C) Pure Aspirin 136 1-2 Crude Aspirin 125
Free Aspirin Carboxylic acid Purity
Caraga State University Cabadbaran Campus Cabadbaran City Dry Leaves as Sand Substitute for Blocks Submitted by: Dime Rose Diola Jerzeld Villalon Lyka Lou Arogancia Natasha Anne Payot Adviser: Prof. Nathalie Daminar Chapter 1 The Problem Background of the Study A leaf is a lateral photosynthetic appendage of the stem of a plant‚ commonly broad‚ flat‚ thin and of a green color. Leaves (plural) are the “food factories of plants‚ the
Premium Oxygen Photosynthesis Waste
Article review Weisman‚ J. (2013). Senate Blocks Drive for Gun Control. Retrieved from http://www.nytimes.com/2013/04/18/us/politics/senate-obama-gun-control.html?_r=1& Jonathan Weisman‚ author of the article‚ studied journalism and African History at Northwestern University. Weisman’s professional career includes time at Education Week‚ CQ‚ USA Today‚ Washington Post and Wall Street Journal
Free Firearm Gun politics Gun politics in the United States
Conclusion: Category 1: Momentum was found that after the collision was less than before the collision by 10%. This was not what has been expected‚ so the difference was fairly significant. This happened because of friction‚ when the two pucks collided‚ they have lost a bit of their momentum‚ so the momentum after the collision differed. Kinetic energy differed more than what was expected‚ it was significantly less after the collision‚ the difference before and after the collision was 63.7%‚
Premium Mass Classical mechanics Introductory physics
material use 166 5.10 Clay briCk Clay Brick Clay brickwork is made from selected clays that are moulded or cut into shape and fired in ovens. the firing process transforms the clay into a building component with high compressive strength and excellent weathering qualities‚ attributes that have been exploited for millennia to build structures ranging from single-storey huts to enormous viaducts. Clay brickwork is australia’s most widely used external cladding and loadbearing wall medium
Premium
and an article about Stumbling Blocks in Intercultural Communication that is written by Barna. It was mainly talking about the problem of people who has misunderstanding on other country’s habits . After reading and watching my homework‚ I thought the first block and the third block is related to the white flower video and the fifth block is related to the baseball video and the Chinese fish video. I thought every video has a big problem because of the sixth block. In this article‚ I would like to
Premium Thought Human Japan
Deforestation Tropical forests include dense rainforests‚ where rainfall is abundant year-round; seasonally moist forests‚ where rainfall is abundant‚ but seasonal; and drier‚ more open woodlands. Tropical forests of all varieties are disappearing rapidly as humans clear the natural landscape for construction‚ to build roads and urban areas and make room farms and pastures (Lindsey‚ 2007). Although deforestation meets some of the human needs‚ it also has profound‚ sometimes devastating‚ consequences
Premium Carbon dioxide
Brief of McCart v H&R Block‚ Inc. Case Name‚ Citation‚ and Court Robert McCart and June McCart‚ v. H &R Block. Inc. 470 N.E.2d 756; 1984 Ind. App. LEXIS 3039 Court of Appeals of Indiana‚ Third District Key Facts Mr. McCart opened a tax preparation business and executed a contract with Block to be a district manager‚ which precluded him from operating a tax business in the same city. McCart then issued the city franchise to his wife. Years later‚ the wife signed a new franchise agreement
Premium Income tax in the United States Contract Taxation in the United States
emotional message behind the verbal message. This is highly needed in informal situations – like talking to friends‚ family especially on an Instant messaging service. However it’s usage in a professional environment is considered very immature. CONCLUSION (Kartikeya Bhatotia) The study done by our group dealt with the often disregarded aspect of communication‚ i.e non verbal communication. Our study focused on the ability of students to observe the facial expressions of a person (an interviewer)
Premium Communication Paul Ekman Nonverbal communication
equivalent representation in the frequency domain. The difference is that while the DFT takes a discrete signal in one spatial dimension and transforms it into a set of points in one frequency dimension and the Discrete Cosine Transform (for an 8x8 block of values) takes a 64-point discrete signal‚ which can be thought of as a function of two spatial dimensions x and y‚ and turns them into 64 DCT coefficients which are in terms of the 64 unique orthogonal 2D spectrum as shown in Fig. 1.19. The DCT
Premium Cryptography Encryption Cipher