From the experiment‚ it was determined that Sodium chloride had a crystalline structure‚ even after being broken into smaller pieces with a hammer. Even though there was two different types of Sodium chloride‚ coarse and fine‚ they still had a symmetrical‚ three-dimensional shape. All ionic compounds have this structure. It was also found that Sodium chloride had a high melting point and sugar had a low melting point. This is because Sodium chloride is ionic and the bonds holding it together take
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Solubility Curve of Sodium Nitrate Data collection |Temperature (°C) | |Mass of solute in 5ml (g) |Mass of solute in 100ml (g) | |1st set of data |2nd set of data |Average | | | |23.5 |24.0 |23.8 |4.5
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lly; chemically it is less piquant cousin of garlic in taste‚ but it is distinctive in its lachrymatory properties. It is occasionally used topically to treat insect stings‚ but personal knowledge suggests it lacks any significant anti-allergy properties. It has mild anti-microbial qualities and has been used in injury
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Sodium borohydride Reduction of Benzil Introduction: The Purpose of this experiment is for the students to learn how to use sodium borohydride to reduce benzil to its secondary alcohol product via reduction reaction. This two-step reaction reduces aldehydes by hydrides to primary alcohols‚ and ketones to secondary alcohols. In order for the reaction to occur and to better control the stereochemistry and yield of the product‚ the metal hydride nucleophile of the reducing agents such as LiH‚ LiAlH4
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Dental amalgam Question 5. What is the percentage of pure gold in a 12-carat gold bracelet? A. 25% B. 50% C. 75% D. 100% Question 6. Which of the following metals is not naturally found as a pure element? A. Platinum B. Silver C. Gold D. Sodium Question 7. During the process of froth flotation‚ waste material is separated from the ore. This waste material is called A. the overburden B slag C gangue D a mineral Question 8. Moving through the activity series for metals from potassium
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Running head: Evidence 1 Evaluating Reliable Evidence Amanda R.Wilborn CM223 Professor C April 19‚ 2011 Introduction Evidence is any information gathered at the scene of a crime that may be relevant to a criminal investigation. There are different types of evidence that varies from Paperwork‚ Photographs‚ DNA‚ Finger prints; etc... These different kinds of evidence also require different types
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direct and circumstantial evidence. One of the evidence markers weighs significantly heavier than the other‚ direct evidence being much more substantial than any circumstantial evidence. However‚ circumstantial evidence may build an entire case. Direct evidence is defined by Criminal Investigation Basic Perspectives‚ Eleventh Edition as an eye witness who through one of the five senses witnesses the crime committed. To further breakdown this definition of direct evidence‚ one may turn to Merriam-Websters
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Digital evidence refers to any piece of electronic information that can be found or retrieve from any electronic device which can be used to provide evidence for any use of violation. Basically‚ “Any information of probative value that is saved or stored in a binary form is digital evidence.” (SWGDE‚ 1998‚ p5). Below are the lists of electronic devices that stores digital evidence and some of the possible ways that the information can be manipulated: Information stored inside mobile phones such
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What is the difference between direct and circumstantial evidence? Give two practical examples of each. Direct evidence proves a fact without interference and does not require any reasoning to arrive at the conclusion to be drawn from the evidence. Basically it can prove a fact by itself. Everything a witness saw‚ heard‚ found‚ etc. are examples of direct evidence. -A customer was present when they robbed the supermarket‚ he witnessed the event. -A person saw through the window when the criminal
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Trace or transfer evidence can be any small‚ and to the untrained be a seemingly insignificant piece of material‚ whether man-made or natural‚ that has been left at a crime scene. Edmond Locard‚ founder of the Institute of Criminalistics at the University of Lyon‚ France‚ developed what has become known as Locard’s Exchange Principle. This states that every contact leaves a trace (Trace Evidence). Trace evidence can consist of just about anything. Some types of trace evidence include but are not
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