invisible bond that holds water molecules together. Water is a polar molecule‚ so it has plus and minus ends just like magnets that attract each other. When the water molecules align with each other they stick together‚ creating surface tension. You might think that it is the surface tension of the water that holds the skin of a bubble together. Actually‚ the surface tension of water is too strong to make a bubble. You can try yourself to blow a bubble with plain old water‚ it just won’t work! A good
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sent to an instructor obseRvations & QUestions - paRt i A. Record your observations and your time and temperature data in tables. Use one table for the pure water and one table for the salt solution. Data Table 1: Pure Water and Salt Solution | Seconds | Distilled H20Room temp | Distilled H20 Ice bath | SaltwaterRoom temp | Saltwater Ice bath | 0 | 25 | 19 | 24 | 12 | 30 | 24 | 13 | 23 | 8 | 60 | 23 | 11 | 22 | 5 | 90 | 22.5 |
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A) The flame is too high and the test tube is opened. B) The opening of the test tube is pointed toward the student and the student is not wearing goggles. C) The test tube is unstoppered and the student is not wearing goggles. D) The beaker has water in it and the flame is under the tripod. 2. Which safety precaution is recommended when a liquid is being heated in a test tube? A) Wear goggles and a laboratory apron. B) Direct the flame of the burner into the open end of the test tube. C) Stopper
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One thing I do not understand with the Flint water is why isn’t anything being done about it? Everyone had recognized that it is a health hazard and that it needs to be corrected. No one has not done a thing about it. Is it better to brush it under a rug and ignore the problem and have it manifest into something worse because that it the direction that we are heading in. With any water the people are forced to move any where else and that’s if they can afford it or not and the rest have to indulge
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3. For the hydrate sodium sulfate decahydrate‚ calculate the following: (a) the percent of sodium (by mass) in the hydrate (14.3%) (b) percent of TOTAL oxygen (by mass) in the hydrated compound. (69.6%) (c) Percent of water (by mass) in the hydrate (55.9%) 4. Calculate the percentage of nitrogen (by mass) in the ammonium nitride (82.4%) Moles Worksheet 1. How many moles are there in 768 grams of iron (III) sulfate?(1.92 mol) 2. How many moles are there
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peppermint oil to make it smell great. You will need: 1 cups plain flour 1/2 cup of salt 2 tablespoons of cream of tartar (optional) 1 tablespoons of cooking oil Food colouring Glitter (optional) Peppermint oil (optional) 1 cups of boiling water 1 child or more if you have them Method: Put all the ingredients in a large bowl and mix. As soon as it starts to bond together and is hard to mix‚ take it out of the bowl throw it on a board and knead until it takes on the look and consistency
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Teachers’ Professional Life Cycles 1 Introduction The idea of teachers’ life cycles isn’t new. I first became familiar with it when reading Amy Tsui’s book on expertise in teaching. The notion that teachers pass through a career cycle matched my own experience‚ and it helped to provide a useful way of thinking about supervising teachers‚ since my particular concern was with this really important aspect of managing a language teaching organization (LTO). So‚ while this article is mostly about teachers’
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Elizabeth Young BIO 220 January 27‚ 2013 Trent McDowell Filter This: The Advantages of Bottling Your Own Water Water‚ life’s most essential element. Is your consumption of this life giving liquid eradicating the Earth as we know it? Bottled water has become a huge trend in the US and the world today. “In 2007‚ Americans spent $11.7 billion on 8.8 billion gallons of bottled water‚” (Palliser‚ 2010‚ p1). They are on the shelves of every convenience store‚ supermarket and vending machine.
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quality due to low mineral content (particularly sodium). Perrier plans being perfect anytime by providing the best tasting sparkling water on the market. They are not only marketing for the rich and/or famous‚ they want to be an everyday thirst quencher. Perrier vision is to be the number one sparkling mineral water in the world. Perrier’s mission is to offer bottled water to meet consumer needs anywhere‚ anytime. In May of 1989 in an issue of Fortune the company was depicted as one of six companies
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reaction temperature by hot product stream. The product stream is cooled to –100 C and in doing it‚ all unreacted ethanol and acetaldehyde are condensed. The out going gaseous stream‚ containing hydrogen mainly‚ is scrubbed with dilute alcohol (alcohol + water) to remove uncondensed products and the undissolved gas. The remaining pure hydrogen (98%) is burnt in stack. The material and energy balance in a plant design is necessary because this fixes the relative flow rates of different flow streams and temperatures
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