***ANSWERS*** CP Chemistry Mole Review Practice Problems Find the mass of 0.89 mol of calcium chloride. 0.89mol x 111 g / 1 mol = 98.8 g Determine the number of moles of C5H12 that are in 362.8g of the compound. 362.8g x 1 mol / 72 g = 5.04 mol Find the mass of 0.159 mol of silicon dioxide. 0.159 mol x 60 g / 1 mol = 9.54 g You are given 12.35 g of C4H8O2. How many moles of the compound do you have? 12.35 g x 1 mol / 88 g = 0.140
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The chemical equation for Thiopental Sodium is C11H17N2NaO2S. First synthesized in 1935‚ the proper name for the drug is Thiopental Sodium it also goes by Sodium Pentothal but that is actually a trademark of the drug ’s manufacturer‚ Abbott Laboratories. A yellow water-soluble crystal‚ it is classified as an ultra-short acting barbiturate‚ a type of drug that depresses the central nervous system‚ slowing the heart rate and lowering blood pressure. Widely used in medicine as an anesthetic during surgery
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Solutions manual: Chapter 1 Getting started © Pearson Education Australia (a division of Pearson Australia Group Pty Ltd) 2006. This page from the Chemistry Dimensions 1‚ Teacher’s Resource may be reproduced for classroom use. QUESTIONS 1 Research 2 Property Solid Liquid Gas Volume Fixed Fixed Variable Shape Fixed Variable Variable Forces between particles Yes Yes No Movement of particles Vibration and rotation Vibration‚ rotation and translation Random and chaotic
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Egyptians: Egyptians used natron to preserve cadavers to obtain eternal life for the deceased. Food was preserved using salt in preparation for droughts. 2. Why is salt essential to our diet? What problems can too much salt in our diets cause? Chloride is essential for digestion and respiration. Salt also allows the body to transport nutrients and oxygen‚ transmit nerve impulses‚ move muscles‚ and manufacture tissues and material. The Yellow Emperors Classic of Internal Medicine‚ a Chinese book
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The Salt Sector of Pakistan | API Final Report | BBA 4 | Date of Submission:June 11‚ 2012 | Submitted to: Ms. Tahira Jaffery | Submitted by:Fariha KhalidHafsa AlviSundus IftikharSyeda Hafsah HasanSyed Aqib Shah | Executive summary The purpose of this report was to examine the export related problems prevalent in the salt sector of Pakistan. Research for this report included interviews with the salt exporters and manufacturers in Pakistan. We interviewed‚ Mr. Ismail Suttar of Hub Salt
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After examining seven additional substances‚ there were many pieces of evidence that help conclude that the mystery mixture ( number 8) is composed of citric acid and sodium bicarbonate the same as mixture six . At first when just observing the dry mixtures‚ it was hard to determine which ones were identical to the mystery mixture. In order to figure out which substances combined to make the mystery mixture‚ another process we followed was adding water to the substances and observing the reaction
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glycol are soluble in water‚ therefore we can say that they are polar substances. Besides‚ I observed that biphenyl‚ butyl acetate‚ glycerol and motor oil are nonpolar substance. These compounds were soluble in hexane. Meanwhile‚ magnesium oxide and sodium bromide did not dissolved in either water nor in hexane. Moreover‚ Iodine and aspirin acted different than what I expected. Iodine is a nonpolar substance but not dissolved in hexane. On the other hand‚ I noticed that aspirin is a nonpolar substance
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1 d. 3 a. S2– b. Na+ c. F– d. P3– a. gain of 1 electron b. loss of 1 electron c. gain of 3 electrons d. loss of 2 electrons e. loss of 2 electrons f. loss of 1 electron g. gain of 1 electron h. loss of 2 electrons a. bromide anion b. sodium cation c. arsenide anion d. barium cation e. calcium cation f. copper(I) cation g. hydride anion h. copper(II) cation S OBLE M ASSESSMENT 27. an electron in the highest occupied energy level 28. a. Group 5A; 5 valence electrons
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The purpose of Module 11A was to test for the presence or absence of a particular set of functional groups through the use of wet chemical tests. In this manner‚ Unknown A which was a colorless solution‚ was first tested with 2‚4-DNP which after mixing for a few seconds formed a bright yellow precipitate. Although this confirms the presence of either a ketone or aldehyde group‚ one simple chemical test does not completely specify the presence or absence of other functional groups. Therefore‚ a second
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When a substance combines with another to form a new substance. 3. Give at least two examples of chemical changes you observed. When you dilute MgO and CuCO3 with HCI it formed two different substances 4. Classify the following properties of Sodium metals as physical of chemical Silver metallic color Physical Turns gray in air Physical Melts at 98 degrees Physical Reacts explosively with chlorine gas Chemical 5. Classify the following changes as Physical or Chemical. Water freezes
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