1. Obtain 1 gram of an impure‚ unknown substance solid. Make sure to stir the mixture before measuring the sample; record the mixture’s code in the data section. 2. Add approx. 25-50 mL of water and several boiling chips to a 125 mL Erlenmeyer flask and heat the water to a gentle boil using a hotplate. 3. On a second hotplate‚ place a 125 mL Erlenmeyer flask containing the one gram of unknown solid along with a boiling chip. 4. Using a ring clamp‚ slowly pour approx. 5-10 mL of boiling water into
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Amphibians are becoming a vanishing species. There are a number of causes for them dieing. But the most recent and worst cause has been discovered. It is responsible for killing off our amphibians. They are dieing by the thousands. They were able to survive and hold on through past extinction spasms‚ surviving even when 95 percent of other animals died out. They even stayed alive when the dinosaurs disappeared. If amphibians could live longer than dinosaurs‚ then why are
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Motivation: Most of my motivation comes from not wanting to be stuck at a crummy job that makes me miserable for the rest of my life. I don’t want my future family to struggle either. Along with all of that‚ I don’t just want a job; I want a career. My mom has struggled to make ends meet all of my life‚ and I want to avoid that. Eventually‚ I want to be able to tell my mom that she doesn’t need to work because I can take care of her. Purpose: My purpose for wanting to get a degree is so
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Teeth with deep grooves‚ known as pits and fissures‚ are often hard to clean‚ and more than 75% of all dental decay begins in these areas. According to Nicholas J. Hurley D.D.S.‚ P.A.‚—a dentist in Thomasville‚ NC who uses top-of-the-line dental care procedures for all clients—a sealant is a thin‚ plastic coating that is applied to the surface area of deep grooves on teeth to make these teeth smooth and easy to clean. Why Have Sealants Added To Teeth? There are many reasons to have sealants applied
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Correction of crowded teeth Crowding is the lack of space for all the teeth to fit normally within the jaws. The teeth may be twisted or displaced. Crowding occurs when there is disharmony in the tooth to jaw size relationship or when the teeth are larger than the available space. Crowding can be caused by improper eruption of teeth and early or late loss of primary (baby) teeth. Crowding Should Be Corrected Because It Can: • prevent proper cleaning of all the surfaces of your teeth • cause dental
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White Teeth by Zadie Smith White Teeth‚ the novel written by Zadie Smith‚ has a very peculiar name and the imagery of teeth is brought up many times throughout the novel. I believe that this reoccurring symbolism of teeth are so prominent because teeth are white no matter what a person’s race is; Teeth are something that everyone shares in common despite all our various backgrounds‚ beliefs‚ and complexions. Everyone is born with teeth‚ but how they end up‚ whether they are cracked‚ or full of cavities
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problem of free will refers to the examination of whether or not we as conscious beings have control over our own actions. French philosopher Paul Henri Thiry‚ Baron d ’Holbach argues that all acts are caused by past events and conditions‚ a belief known as determinism. Physical laws shows us that all events in time are determined by prior events‚ but the belief in free will implies that our actions are results from what we perceive as choice‚ are undetermined random events in time. Therefore‚ I argue
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do good have good It is a law of nature that whatever action we take in this world‚ there is always a reaction. If we do well‚ we stand to gain a good reward. If we do badly‚ we should expect a bad outcome ultimately. "As you sow‚ so shall you reap" is a popular saying. The Holy Qur’an has also guided on this subject‚ it says: "If you do good‚ you do good to yourselves. Likewise‚ if you do evil‚ you do evil to yourselves." (17:7) One of the companions of the Prophet Muhammad was very fond of
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Do People Have Premonitions? There are many debates on whether or not we have a sixth sense. That sixth sense is premonitions. The main questions asked are‚ do people have premonitions? Are they able to have premonitions? Does everyone have premonitions? Do only few people have premonitions? Most people will have dreams that will come true within the next day or the next few days. Many people get mild feelings of premonition; a feeling that something is about to happen‚ being good or bad. It can
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1. You are looking at a Euglena using the x10 objective lens. You rotate the nosepiece around to x40 but the specimen is not visible. Describe what you should do next? Start by using the fine adjustment to attempt to focus on the Euglena. However‚ if it is still not visible‚ return to the x10 objective lens and use the fine adjustment to ensure the Euglena is as sharply focused as possible. Then‚ use the stage control to re-position the slide so the Euglena is directly in the centre of the lens.
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