MATTER AND CHANGE Name _____________________________________ PRACTICE PROBLEMS Period _________________ Date ______________ SECTION 2.1 MATTER 1. Which of the following is not a physical change? a. dissolving sugar in water b. burning gasoline in an engine c. evaporating sea water to obtain salt d. slicing a piece of bread 2. Which of the following is not a property of a gas? a. has a definite shape b. has no definite volume c. assumes the shape of
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weight boat (lid) Procedure: 1. Measure the mass of a beaker‚ 10mL vinegar‚ and 10g baking soda. 2. Mix the compounds in the beaker and wait for the reaction to finish. 3. Record the mass of the beaker and its contents. 4. Determine the remaining mass of the chemicals in the beaker. 5. Measure the mass of a new beaker‚ a plastic weight boat‚ 10mL vinegar‚ and 10g baking soda. 6. Mix the compounds in the beaker‚ and immediately place the plastic boat over the beaker so that it acts as a lid‚ and wait
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Question #1 | | | Jamie wants to earn $500 in interest so she’ll have enough to buy a used car. She puts $2000 into an account that earns interest. How long will she need to leave her money in the account to earn $500 in interest? | | | | Question #2 | | | A local bank is advertising that you can double your money in eight years if you invest with them. Suppose you have $1000 to invest. What interest rate is the bank offering? | | | Try These | | | | | | | |
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Discussion An empirical formula is a formula for a chemical compound found by direct laboratory examination. Laboratory procedures allow the chemist to find the simplest whole number ratio of elements within the compound. In order to find the true molecular formula‚ the chemist also needs to know the compound’s molecular mass. The general procedure is to use laboratory techniques to determine the mass of each element in the compound. In this lab‚ we will react a known quantity of magnesium metal
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Paul Munnelly Business Logistics & Transportation Case Study 1 Integrated Logistics for DEP/GARD Company: C1 C2 C3 C4 C5 C6 Percentage: 60‚60‚15‚15 25‚25‚15‚15 15‚15‚25‚25 60‚60 25‚25 25‚25 Compound: A B E F A B C D A B E F C D E F C D DEP Materials Inventory (7 Days) Manufacturing (6-8 Days) Distribution Warehouse DEP Truck (since destination is within 200 miles) GARD 1. As
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in the Pacific Northwest. Many drug companies and natural products chemists are now turning to the ocean as a source of similar helpful substances. Biotechnology tools are used in identifying‚ isolating‚ characterizing‚ testing‚ and synthesizing compounds discovered in marine animals and plants and then developed into drugs or other products (Fenical‚ 1993; Davidson‚ 1995; Kobayashi and Ishibashi‚ 1993). Figure 1. Proteins in the venom of venomous fish like the devil firefish (Pterois miles) may
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Arene Molybdenum lab Introduction: Organometallic chemistry is the study of chemical compounds that contain carbon atoms bound to a metal atom. Organometallic compounds can contain main group elements‚ or more metallic elements such as zinc or carbon. These compounds tend to have carbon atoms bound to the metal center by σ-bonds. Alternatively‚ transition metals can be involved in the compound‚ which leads to a variety of interesting and diverse chemical characteristics. For example‚ a promising
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Antioxidants November 23‚ 2012 Organic chemistry is the study of structure‚ properties and the reactions dealing with carbon compounds (organic chemistry‚ n.d.). This type of chemistry may deal with small items‚ but knowing how organic chemistry works as a whole has an impact on our daily lives and also the occupations some of us consider. Knowing the bases of organic chemistry can be important and sometimes even required to learn for the bases of many health care professions
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Napoleon’s Buttons 1. The motivation behind each endeavor’s goals could have been the use for good‚ wealth‚ money‚ or prosperity. The chemistry of the compound is related to their usage and motive for obtaining them because molecules can control the trade and use of one specific area of the world. Some major molecules that were valued are phenol‚ isoprene‚ silk‚ cellulose‚ and glucose. Phenols were used as antiseptics during surgery to prevent cuts and wounds from getting infected. Isoprene
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soda reacts with acidic solutions‚ but not with water. Identify which of the five pure compounds is baking soda‚ and which is baking powder. Explain. Number 2 is baking soda and number 3 is baking powder. Baking soda did not react with water and baking powder did. One of our pure substances produced a characteristic color (blue-back) when it reacted with the iodine-alcohol solution. Starch is an organic compound you have probably encountered in your biology course. Identify which of the pure substances
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